Fire + Water = Star of David

In Palestine there was a parallel theoretical development that showed a similar concern with the opposing qualities of fire and water and so with the possible employment of the Hexagram to symbolize their union.

- The Universal Kabbalah, by Leonora Leet

One feature of this ancient science that appears to have surfaced alike in the teachings of Maria Hebraea and the Sefer Yetzirah is a peculiar joint definition of a fire above and water below, which in the later alchemical tradition was identified with the figure of the hexagram and given a Hebrew origin in the names by which it was known, Solomon's Seal and the Shield of David.

- The Universal Kabbalah, by Leonora Leet (https://books.google.com/books?id=oMdrAwAAQBAJ&dq=Kabbalah+Unveiled,+by+Leonora+Leet)