Genesis 24:1-4

Now Abraham was old, advanced in age; and the LORD had blessed Abraham in every way. Abraham said to his servant, the oldest of his household, who had charge of all that he owned, “Please place your hand under my thigh, 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, but you will go to my country and to my relatives, and take a wife for my son Isaac.”