Genesis 27:41-42

41So Esau bore a grudge against Jacob because of the blessing with which his father had blessed him, and Esau said in his heart, “Let the time for mourning my father draw near, so that I can kill my brother Jacob!”

42Now to Rebekah was reported the words of Esau her elder son. So she sent and called for Jacob her younger son, and said to him, “Look, your brother Esau is consoling himself about you with the thought of killing you.