Genesis 24:1-4 NIV

[1] Abraham was now very old, and the LORD had blessed him in every way. [2] He said to the senior servant in his household, the one in charge of all that he had, “Put your hand under my thigh. [3] I want you to swear by the LORD, the God of heaven and the God of earth, that you will not get a wife for my son from the daughters of the Canaanites, among whom I am living, [4] but will go to my country and my own relatives and get a wife for my son Isaac.”