And She shall rise-up from the Hei ה of MoSheH (Moses), [Var. She is י Yod and Shir, וו Vav-Vav will rise from הה Hei-Hei of Mosheh] and reside upon the head of the letter ו Vav, to become the crownlet of the letter ז Zayin, and then he raises Her to the place from where She was hewn.
When She ascends towards higher Yod, She is called ‘ShYR’ (song) – of the male, but when She descends towards Hei ה, She is called ‘ShYRaH’ which is female. It is thus written: Then shall Moses and the Children of Israel sing, (ibid.) this song (shirah) to Ha-Shem... etc. About which it is stated: (Ps. 118:22) The stone which the builders rejected... etc.