Genesis 28:6-9 (King James Version)

 ⁶When Esau saw that Isaac had blessed Jacob, and sent him away to Padanaram, to take him a wife from thence; and that as he blessed him he gave him a charge, saying, Thou shalt not take a wife of the daughers 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;

 ⁹Then went Esau unto Ishmael, and took unto the wives which he had Mahalath the daughter of Ishmael Abraham's son, the sister of Nebajoth, to be his wife.