Genesis 28:6-9

Now Esau saw that Isaac had blessed Jacob and sent him away to Paddan-aram to take to himself a wife from there, and that when he blessed him he charged him, saying, “You shall not take a wife from the daughters of Canaan,” and that Jacob had obeyed his father and his mother and had gone to Paddan-aram. So Esau saw that the daughters of Canaan displeased his father Isaac; and Esau went to Ishmael, and married, besides the wives that he had, Mahalath the daughter of Ishmael, Abraham’s son, the sister of Nebaioth.