Genesis 24:2-5 And Abraham said to the oldest servant of his house, who ruled over all that he had, I pray you, put your hand under my thigh.

MKJV⁽ⁱ⁾ ² And Abraham said to the oldest servant of his house, who ruled over all that he had, I pray you, put your hand under my thigh. ³ And I will make you swear by Jehovah, the God of Heaven and the God of the earth, that you shall not take a wife to my son of the daughters of the Canaanites, among whom I dwell. ⁴ But you shall go to my country and to my kindred, and take a wife to 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 necessarily bring your son again to the land from which you came?