Abraham sent his most trusted servant

Genesis 24:1-4 (ESV)

^1  Now Abraham was old, well advanced in years. And the LORD had blessed Abraham in all things.

^2  And Abraham said to his servant, the oldest of his household, who had charge of all that he had, “Put your hand under my thigh,

^3  that I may make you swear by the LORD, the God of heaven and God of the earth, that you will not take a wife for my son from the daughters of the Canaanites, among whom I dwell,

^4  but will go to my country and to my kindred, and take a wife for my son Isaac.”