Rebekah led Jacob equipped and arrayed in this way to the door of Isaac's chamber. There she parted from him with the words, "Henceforward may thy Creator assist thee." Jacob entered, addressing Isaac with "Father," and receiving the response, "Here am I! Who art thou, my son?" he replied equivocally, "It is I, thy first-born son is Esau." He sought to avoid a falsehood, and yet not betray that he was Jacob.
Isaac then said: "Thou art greatly in haste to secure thy blessing. Thy father Abraham was seventy-five years old when he was blessed, and thou art but sixty-three." Jacob replied awkwardly, "Because the Lord thy God sent me good speed." Isaac concluded at once that this was not Esau, for he would not have mentioned the name of God, and he made up his mind to feel the son before him and make sure who he was.
Terror seized upon Jacob at the words of Isaac, "Come near, I pray thee, that I may feel thee, my son." A cold sweat covered his body, and his heart melted like wax. Then God caused the archangels Michael and Gabriel to descend. The one seized his right hand, the other his left hand, while the Lord God Himself supported him, that his courage might not fail him.
Isaac felt him, and, finding his hands hairy, he said, "The voice is Jacob's voice, but the hands are the hands of Esau," words in which he conveyed the prophecy that so long as the voice of Jacob is heard in the houses of prayer and of learning, the hands of Esau will not be able to prevail against him. "Yes," he continued, "it is the voice of Jacob, the voice that imposes silence upon those on earth and in heaven," for even the angels may not raise their voices in praise of God until Israel has finished his prayers.