14So he went and got them, and brought them to his mother; and his mother made savory food such as his father loved. 15Then Rebekah took the best garments of Esau her elder son, which were with her in the house, and put them on Jacob her younger son. 16And she put the skins of the young goats on his hands and on the smooth part of his neck. 17She also gave the savory food and the bread, which she had made, to her son Jacob. 18Then he came to his father and said, “My father.” And he said, “Here I am. Who are you, my son?”
Isaac knew that Esau was supposed to be coming back, but when he hears the voice of Jacob, he is a little bit confused. Jacob apparently did not spend much time with his father, if his coming was unexpected, and especially if Isaac was unsure about the voice he was hearing. Let us not be guilty of the same with our heavenly father, so that he must ask when we pray, “Who are you, my son?”