He did not recognize him because his hands were hairy like his brother Esau’s hands, so he blessed him.
But Jacob said to his mother Rebekah, “Look, my brother Esau is a hairy man, and I am a man of smooth skin.
and she put the skins of the kids on his hands and on the smooth part of his neck.
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 said, “Are you really my son Esau?” He answered, “I am.”
By faith Isaac invoked blessings for the future on Jacob and Esau.