These then exit, and others are knocking at the entrance, and they are saying: (Ps. 51:17) “ADNY! Open my lips...” And they are the masters of ‘the sign’ of circumcision, which is ‘the life-force∞ḥaiy of worlds’, who pray with ḥaiy (life, =18) blessings of prayer, through which they offer an offering to the blessed Holy One, which is considered as corresponding to: (Num. 23:1)... seven bulls and seven rams... and corresponding to (Lev. 5:7)... two turtle-doves or two doves... For from the aspect of this sign did he say to Moses: (Ex. 3:12)... ‘and this’ (ve-zeh, =18) is the sign for you...
Why Moses's Staff Held the Power of Covenant
Tikkunei Zohar 71:2