Genesis 24:1-6 NKJV

1 Now Abraham was old, well advanced in age; and the Lord had blessed Abraham in all things.
2 So Abraham said to the oldest servant of his house, who ruled over all that he had, "Please, put your hand under my thigh,
3 and I will make you swear by the Lord, the God of heaven and the God of the earth, that you will not take a wife for my son from the daughters of the Canaanites, among whom I dwell;
4 but you shall go to my country and to my family, and take a wife for my son Isaac."
5 And the servant said to him, "Perhaps the woman will not be willing to follow me to this land. Must I take your son back to the land from which you came?"
6 But Abraham said to him, "Beware that you do not take my son back there.