Genesis 24:2 in the World English Bible
Abraham said to his servant, the elder of his house, who ruled over all that he had, “Please put your hand under my thigh.
Context
1 And Abraham was old, and well stricken in age: and the LORD had blessed Abraham in all things.
2 And Abraham said unto his eldest servant of his house, that ruled over all that he had, Put, I pray thee, thy hand under my thigh:
3 And I will make thee swear by the LORD, the God of heaven, and the God of the earth, that thou shalt not take a wife unto my son of the daughters of the Canaanites, among whom I dwell: