Genesis 27:1-4; Genesis 27:22-23
When Isaac was old and his eyes were dim so that he could not see, he called his elder son Esau and said to him, "My son"; and he answered, "Here I am."
He said, "See, I am old; I do not know the day of my death.
Now then, take your weapons, your quiver and your bow, and go out to the field, and hunt game for me.
Then prepare for me savory food, such as I like, and bring it to me to eat, so that I may bless you before I die."
So Jacob went up to his father Isaac, who felt him and said, "The voice is Jacob's voice, but the hands are the hands of Esau."
He did not recognize him, because his hands were hairy like his brother Esau's hands; so he blessed him.