And because of this, when a person causes YQV”Q to descend, through the recitation of the Shm’a, he needs to cause It to descend through ADNY, which is in his mouth. And because of this: (Ps. 51:17) ADNY! Open my lips, and my mouth shall declare your praise.
For there are three prayers on the Sabbath, and the fourth is ‘the additional prayer’: the evening prayer: ‘You have sanctified...’ciiiLiturgical, Sabbath Eve Service – and this is the Lower Shekhinah, which is from the left side, for the Levites are there, of whom it is stated: “And you shall sanctify the Levites...”