Genesis 24:8-10

Amplified Bible

⁸ If the woman is not willing to follow you [to this land], then you will be free from this my oath and blameless; only you must never take my son back there.” ⁹ So the servant put his hand under the thigh of Abraham his master, and swore to him concerning this matter.

¹⁰ Then the servant took ten of his master’s camels, and set out, taking some of his master’s good things with him; so he got up and journeyed to ^[a]Mesopotamia [between the Tigris and the Euphrates Rivers], to the city of Nahor [the home of Abraham’s brother].