Cross reference
Genesis 28:6
6 Now Esau saw that Isaac had blessed Jacob and sent him away to Paddan Aram, to take him a wife from there, and that as he blessed him he gave him a charge, saying, "You shall not take a wife of the daughters of Canaan,"
Genesis 27:33
33 Isaac trembled violently, and said, "Who, then, is he who has taken venison, and brought it me, and I have eaten of all before you came, and have blessed him? Yes, he will be blessed."
Genesis 28:1
1 Isaac called Jacob, blessed him, and commanded him, "You shall not take a wife of the daughters of Canaan.