So Abraham said to the oldest servant of his house, who ruled over all that he had, "Please, put your hand under my thigh,
Genesis 24:2
Surrounding context
24:1 Now Abraham was old, well advanced in age; and the LORD had blessed Abraham in all things.
24:2 So Abraham said to the oldest servant of his house, who ruled over all that he had, "Please, put your hand under my thigh,
24:3 and I will make you swear by the LORD, the God of heaven and the God of the earth, that you will not take a wife for my son from the daughters of the Canaanites, among whom I dwell;