The basic symbol for plurality among the ancient Egyptians was the number three: even the way they wrote the word for “plurality” in hieroglyphics consisted of three vertical marks ( | | | ). Triads of deities were also used to signify a complete system. Examples include references to NTR Atum “when he was one and became three” when he and his wife gave birth. Shu and wife Tefnut then gave birth to Ausar and his wife Auset, and Set and Nebthet. Ausar, Auset and son Heru would form the last NTR triad.
- Other examples:
- The beer used to trick Sekhmet soaked three hands into the ground.
- NTR Ra is named three times to define the sun: dawn, noon, and evening.
- Tehuti is described as the “thrice-great god of wisdom”.
- A doomed prince was doomed to three fates: to die by a crocodile, a serpent, or a dog.
- A mage, in an attempt to enter the land of the dead, threw a powder on a fire three times.
- There are twelve (three times four) sections of Ammint. The dead disembark at the third.
- The Knot of Auset, representing life, has three loops.
- Fives are less common. Examples:
- NTR Ra, named five NTRW.
- Tehuti added five days to the year by winning the light from the moon.
- It took five days for the five children of Nut to be born. These are Ausar, Set, Auset, Nebthet, and Horus the Elder.
- The star, or pentagram, representing the afterlife, has five points.
Seven: symbol of perfection, effectiveness, completeness
The number seven was apparently the symbol of such ideas as perfection, effectiveness, and completeness. Examples:
- Seven thousand barrels of red beer were used to trick Sekhmet out of killing mankind.
- In her search for her husband’s pieces, NTR Auset was guarded by seven scorpions.
- Set tore NTR Ausar’s body into fourteen pieces: seven each for the two regions of Upper and Lower Kemet.
- The Pool symbol, representing water, contains seven zigzag lines.
- The Gold symbol has seven spines on its underside.
Source: https://en.wikipedia. org/wiki/Numbers_in_Egyptian_mythology