Genesis 28:6-9

6Esau learned that Isaac had blessed Jacob and had sent him away to Paddan Aram to get a wife from there. He learned that Isaac had blessed Jacob and had commanded him not to marry any of the Canaanite women.

7He also learned that Jacob had obeyed his father and mother and had left for Paddan Aram.

8Esau realized that his father Isaac disapproved of Canaanite women.

9So he went to Ishmael and married Mahalath, daughter of Abraham’s son Ishmael and sister of Nebaioth, in addition to the wives he had.