Kabbalah zu Bereschit 27:11

Come and behold, every first day of the month, when the moon renews herself; then, the 'End of all Flesh' is given an extra portion which is added to the (regular) sacrifices. Thus, he is occupied by it and uses his portion. Hence, the (right) side of Yisrael remains for them alone so that they can unify with their King. This is why (they offer the scapegoat, also called) 'Hairy' (Heb. se'ir), because it belongs to the part of Esau, who is described as being hairy, as it is written: "Esau my brother is a hairy (Heb. sa'ir) man" (Gen. 27:11). Thus, (the 'end of all flesh') uses his part (of Esau, which is the left), while Yisrael uses their part, (which is the right). Thus, it is written: "For Kah has chosen Jacob to Himself, Yisrael for His peculiar possession" (Ps. 135:4).