And come see: the Lower Shekhinah, when She is irrigated from the vowel-points, is called ḥireq ִ, ḥolem ֹ, shureq ּ. For whom? For that channel, which is Vav ו (=6), which includes six channels, for they are all from six letters, which are A-B-G-Y-T-Tz etc. There are six channels that suspend from it, and it includes six others. And they all add up to 42. She is called ḥireq ִ, ḥolem ֹ, shureq ּ of that channel, like this: וִֹּ.
And so She is called in relation to Yod י, and so also in relation to Hei ה, and the mystery of the matter: (Is. 44:6)... I am first, and I am last... etc.