Genesis 24:4

Abraham was old, and well advanced in age. The LORD had blessed Abraham in all things.

Abraham said to his servant, the elder of his house, who ruled over all that he had, “Please put your hand under my thigh.

I will make you swear by the LORD, the God of heaven and the God of the earth, that you shall not take a wife for my son of the daughters of the Canaanites, among whom I live.

The servant said to him, “What if the woman isn’t willing to follow me to this land? Must I bring your son again to the land you came from?”

Abraham said to him, “Beware that you don’t bring my son there again.

The LORD, the God of heaven—who took me from my father’s house, and from the land of my birth, who spoke to me, and who swore to me, saying, ‘I will give this land to your offspring—he will send his angel before you, and you shall take a wife for my son from there.