The use and meaningfulness of the number seven, and the seven point star known as a heptagram (also called a septagram), throughout science, religions, mythology, superstitions, and philosophies has transcended geography, culture, language and time.

Here is what search results will tell you at a top level based on either the number seven or the heptagram.  I took lots of searches with scattered results so the following is not in any particular order or priority.

• The heptagram was used in Christianity to symbolize the seven days of creation and became a traditional symbol for warding off evil…..see police badges like the CHP.
  • There are also the seven deadly sins, the seven layers of purgatory, and the seven sacraments in the Catholic church.
  • The heptagram is a symbol of perfection (or God) in many Christian religions.
• Genesis 1:1 was composed of seven Hebrew words containing a total of 28 letters. Throughout the Bible the number seven appears repeatedly as a symbol of divine perfection – the 7 days of creation
• In Christian tradition, the seven heavenly virtues combine the four cardinal virtues of prudence, justice, temperance, and fortitude with the three theological virtues of faith, hope, and charity.
• Psalm 7, the seventh psalm in the Book of Psalms, is traditionally attributed to King David, and is a regular part of many Christian and Jewish liturgies. The psalm’s message is that the righteous will ultimately prevail against the wicked, even though they may seem weak
• The 7seals in the Book of Revelation are a series of events that will occur on Earth from the time of Christ until his second coming. Each seal represents a specific time period and event.
  • First seal: Suggests military force and government action
  • Second seal: A fiery red horse ridden by someone who takes peace from Earth, causing people to kill each other
  • Third seal: A black horse ridden by someone who causes famines and food shortages
  • Fourth seal: A pale horse ridden by Death, who is given power to kill with sword, famine, pestilence, and wild beasts
  • Fifth seal: Souls crying out from under the altar
  • Sixth seal: Events connected with the second coming of Christ
  • Seventh seal: Silence in heaven, and the distribution of trumpets to seven angels
• In both Islam and Judaism, there are seven heavens.
  • In Islam, the seven heavens, or samāwāt (سماوات), are regions above Earth that are guarded by angels and inhabited by souls
  • In the Talmud (Hebrew Bible), it is suggested that the upper part of the universe is made up of seven heavens (Hebrew: shamayim):[15]
    • Vilon (וילון), see (Isa 40:22)
    • Raki’a (רקיע), see (Gen 1:17)
    • Shehaqim (שחקים), see (Ps 78:23, Midr. Teh. to Ps. xix. 7)
    • Zebul (זבול), see (Isa 63:15, 1 Kings 8:13)
    • Ma’on (מעון), see (Deut 26:15, Ps 42:9)
    • Machon (מכון), see (1 Kings 8:39, Deut 28:12)
    • Araboth (ערבות), The seventh Heaven where ophanim, the seraphim, and the hayyoth and the Throne of God are located.[16]
• The number seven is Judaism’s most sacred number and signifies fullness or completeness
• The Seal of the Seven Archangels is a powerful symbol and talisman used in esoteric and spiritual traditions to invoke the protection, guidance, and blessings of the seven archangels, who are believed to be divine intermediaries. Often incorporating a seven-pointed star (heptagram) or hexagram with the names of these powerful spiritual beings, the seal is used to ward off negative energies, promote happiness, and provide spiritual protection in various traditions, including Christianity, Judaism, Islam, and New Age spirituality.
  • The “Seal of the Seven Archangels” doesn’t have a single, clear origin, but rather developed from various religious and mystical traditions, including the Book of Enoch (which listed several archangels), Babylonian mythology, and astrological beliefs associating angels with the seven classical planets. This symbol, often a seven-pointed star (heptagram), became a widely recognized talisman in ceremonial magic and esoteric traditions for protection and to invoke spiritual guidance.
  • The Seven Archangels associated with the virtues, although not explicitly named in the Bible, are widely recognized in tradition, with variations in specific names and virtues, but generally include Michael (Justice), Gabriel (Faith), Raphael (Temperance), Uriel (Wisdom), Jophiel (Hope), Chamuel/Camael (Love/Fortitude), and Zadkiel (Righteousness/Loyalty). These virtues are often presented as divine responses to the Seven Deadly Sins, aiming to guide humanity toward goodness.
    • The seven deadly sins according to the Catholic Church are pride, greed, wrath, envy, lust, gluttony, and sloth.
• Allah created seven heavens, seven earths and seven days, and man’s creation is completed in seven stages
• In Islam, the heptagram is used to represent the first seven verses in the Quran
  • The first seven verses of the Quran are from the first chapter, Surah Al-Fatihah, which is also known as the “Opening” or “Fatiha”:
    • Verse 1: “In the name of God (Allah), the Compassionate and Merciful”
    • Verse 2: “Praise be to God, Lord of the worlds”
    • Verse 3: “the Compassionate and Merciful”
    • Verse 4: “Master of the Day of Judgement”
    • Verse 5: “Thee we worship and from Thee we seek help”
    • Verse 6: “Guide us upon the straight path”
    • Verse 7: “the path of those whom Thou hast blessed, not of those who incur wrath, nor of those who are astray”
• The heptagram is known among neopagans as the Elven Star or Fairy Star. It is treated as a sacred symbol in various modern pagan and witchcraft traditions.
• In alchemy, a seven-sided star can refer to the seven planets which were known to ancient alchemists.
• George Gurdjieff, an eighteenth century philosopher and mystic, speaks very explicitly about seven days, seven colors, seven tones, seven vibrations, seven branches of knowledge. 
• The Law of Seven is an ancient spiritual law that states that everything in the universe vibrates at its own unique frequency
• In astrology, the number 7 is associated with the planet Neptune, which is linked to dreams, feelings, and things that are difficult to see
• In numerology, the number 7 is often associated with knowledge, mystery, and intuition
• People who are associated with the number 7 are thought to be wise, insightful, and intellectual, and may also be introspective and truthful. They may also be focused, confident, and assertive, and may value fairness and truth.
• The Pythagoreans invested particular numbers with unique spiritual properties. The number seven was considered to be particularly interesting because it consisted of the union of the physical (number 4) with the spiritual (number 3). In Pythagorean numerology the number 7 means spirituality.
• After Birth, the 7th hour decides whether the child will live, in 7 days the cord falls off, in twice 7 days the eyes follow a light, thrice 7 days turns the head, 7 months gets teeth, twice 7 months sits firmly, thrice 7 months begins to talk, after 4 times 7 months walks strongly.
  • After 7 years, teeth of a second set appear.
  • After 14 years is the arrival of generative power.
  • After 21 years, the hair of Manhood is completed.
  • After 28 we cease to grow, at 35 is greatest strength, 
  • At 49 is the greatest discretion, and 70 is the natural end of Life.
• The body has seven obvious parts, the head, chest, abdomen, two legs and two arms.
• There are seven internal organs, stomach, liver, heart, lungs, spleen and two kidneys.
• 7 seas
• 7 continents
• 7 wonders of the world
• 7 colors of the rainbow
• 7 musical octaves
• 7even days in a week
• 7 chakras
  • Root (Muladhara): Located at the base of the spine, this chakra is said to provide stability, grounding, and a sense of security 
  • Sacral (Svadhishthana): This chakra is said to enhance creativity, passion, and emotional well-being 
  • Solar Plexus (Manipura): This chakra is said to boost confidence, personal power, and self-esteem 
  • Heart (Anahata): Located in the middle of the chest, this chakra is said to promote love, compassion, and emotional healing 
  • Throat (Vishuddha): This is one of the higher three chakras 
  • Third Eye (Ajna): This is one of the higher three chakras 
  • Crown (Sahasrara): This chakra is said to represent our connection to the divine and universal consciousness
• In many mythologies, the number seven appears, including:
  • The seven lives of cats in Iran and other cultures 
  • The seven gateways Inanna traversed in the underworld 
  • The seven sister goddesses in Baltic mythology 
  • The seven prominent monsters in Guaraní mythology 
  • The seven steps taken by the Buddha after his birth
• The number seven appears in many folk tales, including:
  • The seven years Thomas the Rhymer spent in the faerie kingdom 
  • The idea that breaking a mirror leads to seven years of bad luck
• 7 Sisters
  • Seven is the number of stars in the Pleiades, known as the Seven Sisters, each of which represents for the Hopi one of the universes designated for the people and defines the length of the seven songs of Creation, and all together “the way of man on his Road of Life through seven consecutive worlds
• Seven Senses: smell, taste, sight, touch, hearing and 6th, Mental perception, with 7th, spiritual understanding
• The neutral pH balance is seven.
• Number of spots most commonly found on ladybugs is seven.
• 7 stages of life with associated planets; thus:
  • Infancy – Moon, Luna;
  • Childhood – Mercury, Knowledge;
  • Youth – Venus, Love;
  • Maturity – Mars;
  • Manhood – Sol (Sun), Full Strength;
  • Judgment – Jupiter;
  • Old Age – Saturn.
• When we pass white light through a prism it splits into 7 distinct colors. Thus white light or visible light contains within it 7 colors. This phenomenon also explains why rainbows display seven colors.
• In Hinduism, the Sun God, Surya, travels across the sky in a chariot pulled by seven horses. These seven horses symbolize the seven colors. Therefore, the seven-pointed star also represents the Sun and the infinite solar energy that is responsible for all life on Earth.
• The seven Pheras, also known as the Saptapadi, is a significant Hindu wedding ritual where the bride and groom walk around a sacred fire seven times, reciting vows at each step.  During a Hindu wedding ceremony, the bride and groom walk around a holy fire seven times, symbolizing their union and commitment across seven lifetimes
• Buddhism also teaches the seven factors of enlightenment, or satta sambojjhaṅgā, which are:
  • Mindfulness (sati)
  • Investigation of the dhamma (dhammavicaya)
  • Energy (viriya)
  • Happiness (piti)
  • Calm (passaddhi)
  • Concentration (samadhi)
  • Equanimity (upekkha)
• Also in Buddhism, seven represents the cycle of life and death, and appears in many aspects of Buddhist mythology and belief:
  • The Buddha’s birth: After being born, the Buddha took seven steps and declared himself the World-Honored One.
  • Maya’s death: Maya died seven days after the Buddha’s birth.
  • The soul’s crossing over: In folk Buddhist belief, the soul crosses over after seven or 49 days.
  • The seven lives of the stream enterer: The seven lives of the stream enterer represent crossing over the cycle of life and death.
  • The lunar cycles: The number seven relates to the lunar cycles, which represent a sense of a cycle, return, death, and rebirth.
  • The number of visible planets: The number seven relates to the number of visible planets, which also represent a sense of a cycle, return, death, and rebirth
• In Confucianism, 7 represents harmony between yin, yang, earth, fire, water, wood, and metal. 7 days of the week, 7 colors of the rainbow
• Japanese Buddhists celebrate a baby’s seventh day and mourn the seventh day after a person dies when the soul is said to cross over.
• The number seven is the smallest number that’s a happy number, meaning it eventually ends in a sequence of ones when you repeatedly square its digits and add the answers.
• Big dipper has seven main stars
  • To the Hindu, the Big Dipper is represented by the seven wise men or sages
  • Before the Civil War, the Big Dipper was a guide to freedom for slaves traveling on the Underground Railroad. The Big Dipper points to the North Star. Runaway slaves who found the Big Dipper used it to lead them North to freedom.
  • In Arabian lore, the Big Dipper is associated with funerals. The bowl represents a coffin and the three stars in the handle are mourners following behind 
• In Polynesia, the seven-pointed star is used often in imagery, basket making, tattoos, and is considered to be a symbol of Kanaloa, the first Polynesian navigator
• In geometry, The number 7 represents purity, wisdom, unconditional love, and Spirit. It is also associated with the rhythm of life, i.e. it embodies the idea of a complete cycle of manifestation due to its qualities of perfect unity (3 – trinity) and materiality (4 – quaternary). It expresses the idea of the rule of spirit over form and symbolizes the connection between the macrocosm and the microcosm.
• In Egyptian mythology, the number seven symbolizes perfection, effectiveness, and completeness
• Also in Egyptian mythology, The first rite of passage for Egyptian babies was a ceremony called the Sebou, which was held on the seventh day of the baby’s life and the Seven Hathors were a group of goddesses associated with fate and fortune telling. They were worshipped in seven cities, and their priests could read the fortunes of newborns and explain people’s dreams.
  • The Seven Hathors of the Celestial Herd (aka The Pleiades).
  • The Seven Hathors were a group of sacred forms of the Egyptian goddess Hathor that determined an infant’s fate at birth. They were sometimes depicted as seven cows, accompanied by the Bull of the West, a minor sky and afterlife deity. The names of the Seven Hathors were:
    • “Lady of the Universe”
    • “Sky-storm”
    • “The hidden one, presiding over her place”
    • “You, from Khemmis”
    • “Red-hair”
    • “Bright Red”
    • “Your Name prevails over the West”
• In Chinese culture, this is recognized as Liù Jio Xng, and it signifies good fortune and fortunate energy.
• In Native American customs, this is linked to the balance of the realms and the seven directions.
• In Hermeticism, it symbolizes the coexistence of the heavenly and physical worlds.
• Seven churches in Book of Revelations
  • Some historicists typically interpret the seven churches as representing seven different periods in the history of the Western Church from the time of Paul until the return of Jesus Christ. 
• In Revelation 1:20, the Son of Man is seen walking among seven lampstands and holding seven stars in his right hand. The seven stars represent the angels of the seven churches, and the seven lampstands represent the seven churches.
• In Revelation 16, the seventh angel announces that the time of the Second Coming has come.
• In alchemy, the seven-pointed star represents the seven planets known to early alchemists and the seven alchemical substances: fire, water, air, earth, sulfur, salt, and mercury
• The seven-pointed star is a significant symbol in Cherokee culture. It represents the seven clans of the Cherokee people: Bird, Long Hair, Paint, Deer, Wolf, Blue, and Wild Potato. The star also represents the seven characters of Sequoyah’s syllabary, which means “Cherokee Nation”.
• The number seven is also significant in:
  • Mesopotamian culture 
  • The cult of Mithra 
  • The Indian Vedas 
  • Chinese culture, where it’s considered a good number for relationships 
  • Hinduism, where it symbolizes cycles and completion

Additional links and documentation can be found here: https://en.wikipedia.org/wiki/7 and you will go down several rabbit holes googling the use of the number seven and reading the AI generated answers.

What I found most interesting is that there is no use of the number seven in Animism. Animism is a way of viewing the world where all things, including animals, plants, rocks, and rivers, have a spiritual essence. Animism is not a set religion, but rather a way of engaging with the world. Simply put, animism is a worldview which states that all beings, humans, animals, plants, lands, and waters, live within an interconnected web of spirituality. Animism applies personhood and agency to non-human beings.

Also, there is no number seven in Aboriginal Spirituality. Aboriginal Spirituality is different than Animism. Aboriginals believe that many animals and plants are interchangeable with human life through re-incarnation of the spirit or soul. The Golden Rule in Aboriginal Spirituality states that “we are as much alive as we keep the earth alive.” By treating the earth with the same respect we expect for ourselves, we may foster our connection with the environment and be more motivated to ensure its’ survival. Aboriginals believe that the entire world was made by their Ancestors way back in the very beginning of time, the Dreamtime. The Ancestors made everything. The Ancestors made particular sites to show the Indigenous people which places were to be sacred. Only the number four is meaningful to Aboriginal belief. The Dreamtime has four parts: The beginning of everything; the life and power of the ancestors; the way of life and death; and power in life. Dreamtime was all four of these things at the same time because it is more powerful than time and space.

Oh, and my wife was the seventh child.

There is a lot more to explore about aboriginal spirituality but that is for another post.