Rabbi Judan said that Jacob declared that Isaac blessed him with five blessings, and God correspondingly appeared five times to Jacob and blessed him ( and ). And thus, in Jacob "offered sacrifices to the God of his father Isaac," and not to the God of Abraham and Isaac. Rabbi Judan also said that Jacob wanted to thank God for permitting Jacob to see the fulfillment of those blessings. And the blessing that was fulfilled was that of "Let people serve you, and nations bow down to you," which was fulfilled with regard to Joseph. (And thus Jacob mentioned Isaac then on going down to witness Joseph's greatness.)