And Esau hated Jacob because of the blessing with which his father had blessed him. And Esau said in his heart, The days of mourning for my father are at hand, and I will slay my brother Jacob.
And the words of Esau her elder son were told to Rebecca. And she sent and called Jacob her younger son, and said to him, Behold, thy brother Esau, as touching thee, comforts himself that he will kill thee.
References for Genesis 27:42
And now, my son, hearken to my voice, and arise, flee to Laban my brother, to Haran;
and abide with him some days, until thy brother's fury turn away --
until thy brother's anger turn away from thee, and he forget what thou hast done to him; then I will send and fetch thee thence. Why should I be bereaved even of you both in one day?
And Rebecca said to Isaac, I am weary of my life because of the daughters of Heth. If Jacob take a wife of the daughters of Heth, such as these, of the daughters of the land, what good should my life do me?