The hexagram is usually associated with the Biblical Solomon, best known as the Star of David in the Jewish religion.
In terms of ritual magic however, the hexagram is referred to as "The Seal of Solomon"
The seal of Solomon symbolises Divine Union. Upon closer inspection, you'll find that the symbol is composed of a female, water element triangle, and a male, fire element triangle. The traditional elemental triangles of earth, air, water, and fire are derived from the seal.