Genesis 26:34-28:9(ESV)

34 When Esau was forty years old, he took Judith the daughter of Beeri the Hittite to be his wife, and Basemath the daughter of Elon the Hittite, 35 and they made life bitter[a] for Isaac and Rebekah
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41 Now Esau hated Jacob because of the blessing with which his father had blessed him, and Esau said to himself, “The days of mourning for my father are approaching; then I will kill my brother Jacob.” 42 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. 43 Now therefore, my son, obey my voice. Arise, flee to Laban my brother in Haran 44 and stay with him a while, until your brother's fury turns away— 45 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?”

46 Then Rebekah said to Isaac, “I loathe my life because of the Hittite women.[e] If Jacob marries one of the Hittite women like these, one of the women of the land, what good will my life be to me?”
Jacob Sent to Laban

28 Then Isaac called Jacob and blessed him and directed him, “You must not take a wife from the Canaanite women. 2 Arise, go to Paddan-aram to the house of Bethuel your mother's father, and take as your wife from there one of the daughters of Laban your mother's brother. 3 God Almighty[f] bless you and make you fruitful and multiply you, that you may become a company of peoples. 4 May he give the blessing of Abraham to you and to your offspring with you, that you may take possession of the land of your sojournings that God gave to Abraham!” 5 Thus Isaac sent Jacob away. And he went to Paddan-aram, to Laban, the son of Bethuel the Aramean, the brother of Rebekah, Jacob's and Esau's mother.
Esau Marries an Ishmaelite

6 Now Esau saw that Isaac had blessed Jacob and sent him away to Paddan-aram to take a wife from there, and that as he blessed him he directed him, “You must not take a wife from the Canaanite women,” 7 and that Jacob had obeyed his father and his mother and gone to Paddan-aram. 8 So when Esau saw that the Canaanite women did not please Isaac his father, 9 Esau went to Ishmael and took as his wife, besides the wives he had, Mahalath the daughter of Ishmael, Abraham's son, the sister of Nebaioth.