Genesis 27:41-42

27:41 So Esau hated Jacob because of the blessing his father had given to his brother. Esau said privately, “The time of mourning for my father is near; then I will kill my brother Jacob!”

27:42 When Rebekah heard what her older son Esau had said, she quickly summoned her younger son Jacob and told him, “Look, your brother Esau is planning to get revenge by killing you.