Genesis 24:1-4Young's Literal Translation (YLT)
24 And Abraham [is] old, he hath entered into days, and Jehovah hath blessed Abraham in all [things];
2 and Abraham saith unto his servant, the eldest of his house, who is ruling over all that he hath, `Put, I pray thee, thy hand under my thigh,
3 and I cause thee to swear by Jehovah, God of the heavens, and God of the earth, that thou dost not take a wife for my son from the daughters of the Canaanite, in the midst of whom I am dwelling;
4 but unto my land and unto my kindred dost thou go, and hast taken a wife for my son, for Isaac.'