Esav hated Ya`akov because of the blessing with which his father blessed him. Esav said in his heart, "The days of mourning for my father are at hand. Then I will kill my brother Ya`akov."
The words of Esav, her elder son, were told to Rivka. She sent and called Ya`akov her younger son, and said to him, "Behold, your brother Esav comforts himself about you by planning to kill you.
Now therefore, my son, obey my voice. Arise, flee to Lavan, my brother, in Haran.
Stay with him a few days, until your brother's fury turns away;
until your brother's anger turn away from you, and he forgets what you have done to him. Then I will send, and get you from there. Why should I be bereaved of you both in one day?"
Rivka said to Yitzchak, "I am weary of my life because of the daughters of Het. If Ya`akov takes a wife of the daughters of Het, such as these, of the daughters of the land, what good will my life do me?"