Genesis 24:3-6 New American Standard Bible (NASB)

3. and I will make you swear by the Lord, the God of heaven and the God of earth, that you shall not take a wife for my son from the daughters of the Canaanites, among whom I live,

4. but you will go to my country and to my relatives, and take a wife for my son Isaac."

5. The servant said to him, "Suppose the woman is not willing to follow me to this land; should I take your son back to the land from where you came?"

6. Then Abraham said to him, "Beware that you do not take my son back there!

Genesis 24