Part 16 · Chapter 150

But through the back-to-back coupling, the light is drawn to Assiya in the aspect of three within three (Gimmel be-Gimmel). And the reason is that Malchut nests in Ofan; and when the Nukva stands back to back, she has in ZA only a place of the three lower [Sefirot] (GAT) alone. Therefore, when she nests in this back-to-back manner, he gives there only the aspect of three within three, which correspond to the measure of the place she would take from ZA when they are back to back.