Genesis 28:5-28:9
Then Isaac sent Jacob off, and he went to Paddan-aram, to Laban the son of Bethuel the Aramean, the brother of Rebekah, mother of Jacob and Esau.
When Esau saw that Isaac had blessed Jacob and sent him off to Paddan-aram to take a wife from there, charging him, as he blessed him, "You shall not take a wife from among the Canaanite women," and that Jacob had obeyed his father and mother and gone to Paddan-aram, Esau realized that the Canaanite women displeased his father Isaac. So Esau went to Ishmael and took to wife, in addition to the wives he had, Mahalath the daughter of Ishmael son of Abraham, sister of Nebaioth.