Genesis 28:6-9

6When Esau saw that Isaac had blessed Jacob, and sent him away to Padanaram, to take him a wife from there; and that as he blessed him he gave him a charge, saying, Thou shalt not take a wife of the daughters of Canaan; 7And that Jacob obeyed his father and his mother, and was gone to Padanaram; 8And Esau seeing that the daughters of Canaan pleased not Isaac his father;1 9Then went Esau to Ishmael, and took to the wives which he had Mahalath the daughter of Ishmael Abraham’s son, the sister of Nebajoth, to be his wife.2