Genesis 28:1-9
Esau Marries an Ishmaelite
1 So Isaac called for Jacob and blessed him. Then he commanded him: “Do not marry a Canaanite woman. 2 Go at once to Paddan Aram, to the house of your mother’s father Bethuel. Take a wife for yourself there, from among the daughters of Laban, your mother’s brother. 3 May God Almighty bless you and make you fruitful and increase your numbers until you become a community of peoples. 4 May he give you and your descendants the blessing given to Abraham, so that you may take possession of the land where you now reside as a foreigner, the land God gave to Abraham.” 5 Then Isaac sent Jacob on his way, and he went to Paddan Aram, to Laban son of Bethuel the Aramean, the brother of Rebekah, who was the mother of Jacob and Esau.
6 Now Esau learned that Isaac had blessed Jacob and had sent him to Paddan Aram to take a wife from there, and that when he blessed him he commanded him, “Do not marry a Canaanite woman,” 7 and that Jacob had obeyed his father and mother and had gone to Paddan Aram. 8 Esau then realized how displeasing the Canaanite women were to his father Isaac; 9 so he went to Ishmael and married Mahalath, the sister of Nebaioth and daughter of Ishmael son of Abraham, in addition to the wives he already had.
Isaac blesses his son Jacob and commands him not to marry a Canaanite woman...He wants him to go to Paddan Aram, to the house of his mother's father Bethuel to find a wife...Isaac asks Jacob to take a wife from the daughters of Laban, which is his mother's brother...Jacob would find a wife among his relatives...Isaac asks that God may bless his son Jacob and that he be fruitful and increase his family numbers until he has a community of peoples...And Isaac asks that God give Jacob the Promised Land, the land God gave to his father, Abraham...So off Jacob goes to Paddan Aram to find Laban, and to find a wife...
Now when Esau hears that his father did not want his brother to marry a Canaanite woman, he does something quite different, yet similar...Esau goes off and decides to marry again...He would find another wife among his relatives...This marriage would be to an Ishmaelite, a descendant of Abraham's first Son with Hagar...This wife would be a grandchild of Abraham...Yet, the promise of God to Abraham would go through Isaac and then to Jacob...The Messiah, the Son of God would come through this lineage: Abraham, Isaac, and now Jacob...