Part 15 · Chapter 90

And after she was corrected in the back, when the eve of the Sabbath came, it arose in the will of the Supreme Emanator to return her face to face, so that their coupling would be complete. For when they are back to back, their coupling too is back to back; and moreover, when she is in the back, the female must also be inferior and smaller than him, for then she receives illumination through her husband. Therefore He wanted to return her face to face, so that the two of them would be equal. And then what did He do? The Lord God cast a deep sleep upon the man, which is ZA, and only a measure of vitality (Kista deChayuta) remained in him.