Kabbalah su Cantico dei cantici 2:6

Come and behold, it is written "And Benaiah the son of Jehoida, the son of a valiant (lit. 'living') man" (II Shmuel 23:20). This means that he was righteous and illuminated his generation as the living one above illuminates the world. Thus, the well constantly looks to the living one in order to be illuminated. "And Isaac dwelt by Be'er Lachai Ro'i. "It is written, "When he took Rivkah," FOR and as he united with her, the joining of darkness and night, as it is written, "his left hand is under my head" (Shir Hashirim 2:6) And Come and behold, Isaac was in Kiryat Arba after Abraham died. What about the verse that reads, "And Isaac dwelt by Be'er Lachai Ro'i?" That with which he joined and was united in that well, to stir up love, as we said.

Come and behold, when Abraham came into the world, he embraced the moon and brought her near. When Isaac came, he took her and held her and drew her lovingly, as it is written, "his left hand is under my head" (Shir Hashirim 2:6). When Jacob came, he united the sun, with the moon and it shone. So Jacob became whole in every aspect, and the moon shone, and was perfected by the twelve tribes.

Now a prior aspect of this union includes the aspect of embrace which occurs at the hand of Ḥesed and Gevurah. This mystery is hinted at in the verse, his left hand is under my head (Song of Songs 2:6, 8:3)—this indicates that the emanation of Ḥesed is influenced by Tiferet and unites with it. Afterwards Tiferet continues [the emanation] to Gevurah and unites with it. Thus the Bridegroom is united on his two arms. After that he receives the Bride with his left hand, and Gevurah extends into Malkhut and influences it. After that, the emanation of Ḥesed, the right arm, continues to her, and thus the left hand is below and the right hand embraces above. This is the mystery of his left hand.