Genesis 27:1-4; Genesis 27:22-23
When Isaac had become an old man and was nearly blind, he called his eldest son, Esau, and said, "My son." "Yes, Father?"
"I'm an old man," he said; "I might die any day now.
Do me a favor: Get your quiver of arrows and your bow and go out in the country and hunt me some game.
Then fix me a hearty meal, the kind that you know I like, and bring it to me to eat so that I can give you my personal blessing before I die."
So Jacob moved close to his father Isaac. Isaac felt him and said, "The voice is Jacob's voice but the hands are the hands of Esau."
He didn't recognize him because his hands were hairy, like his brother Esau's.