Genesis 27
41 Ref And Esau hated Jacob because of the blessing wherewith his father blessed him. And Esau said in his heart, The days of mourning for my father are at hand. Then will I slay my brother Jacob.
42 Ref And the words of Esau her elder son were told to Rebekah. And she sent and called Jacob her younger son, and said unto him, Behold, thy brother Esau, as touching thee, doth comfort himself, `purposing' to kill thee.