Genesis 24:3

24:3 so that I may make you solemnly promise by the Lord, the God of heaven and the God of the earth: You must not acquire a wife for my son from the daughters of the Canaanites, among whom I am living.

Genesis 24:41

24:41 You will be free from your oath if you go to my relatives and they will not give her to you. Then you will be free from your oath.’