Now Esau 1hated Jacob because of the blessing with which his father had blessed him, and Esau said to himself, 2"The days of mourning for my father are approaching; 3then I will kill my brother Jacob."
References for Genesis 27:41
But the words of Esau her older son were told to Rebekah. So she sent and called Jacob her younger son and said to him, "Behold, your brother Esau comforts himself about you by planning to kill you.
Now therefore, my son, obey my voice. Arise, flee to Laban my brother in Haran
and stay with him a while, until your brother's fury turns away--
until your brother's anger turns away from you, and he forgets what you have done to him. Then I will send and bring you from there. Why should I be bereft of you both in one day?"