Esau was furious at Jacob because his father had blessed him, and Esau said to himself, When the period of mourning for the death of my father is over, I will kill my brother.
References for Genesis 27:41
Rebekah was told what her older son Esau was planning, so she summoned her younger son Jacob and said to him, "Esau your brother is planning revenge. He plans to kill you.
So now, my son, listen to me: Get up and escape to my brother Laban in Haran.
Live with him for a short while until your brother's rage subsides,
until your brother's anger at you goes away and he forgets what you did to him. Then I will send for you and bring you back from there. Why should I suffer the loss of both of you on one day?"