Three 'mothers', seven 'double' and twelve 'simple', these are the twenty-two letters.
ה–ו–ה–י, Tetragrammaton, that is our Lord of Hosts, exalted, and existed in the ages, whose Name is Holy, created three 'fathers', fire and spirit and water, progressing beyond them, seven heavens with their armies of angels; and twelve limits of the universe.
In proof of these things, and witnessing faithfully are the Universe, the Year of time, and Man himself, the Microcosm. He fixed these as testimonies of the Triad, the Heptad, and the Dodecad; the twelve constellations, rulers of the world, the Dragon Tali which environs the universe, and the microcosm, man. The triad, fire, water, and air; the fire above, the water below, and the air in the midst. The proof of which is that air is a participator with both.