Rabbi Shimon Bar Yochai

“ The י' from the name ש-ד-י which is the imprint of the covenant that Moshe gave to the mixed multitude. Because of this Moshe fell from his level, as it is written, "Go, descend because your people caused destruction" (Exo. 32:7) ; it says 'your nation' not My nation. Through his hands in the future the Shechinah will be united with Hashem; because it is he [Moshe] that separated them [the Sh' and H' due to his Erev Rav] ; therefore he needs to unify them [the Sh' and H'] , to rectify what he [Moshe] erred. ”

“ In order not to separate between the sixth which is the Middle Column [Waw] and between the Seventh [=Nuqva the female the Hei] which is his soul mate, one needs to destroy all the sour dough (SAR) and chametz, which is the mixed multitude, in order not to see it between the sixth which is the ו' and the seventh, as it says about it, "seven times a day I praise you" (ibid. 119:164) . ”