Genesis 24:4 WEB

²  Abraham said to his servant, the elder of his house, who ruled over all that he had, 'Please put your hand under my thigh.

³  I will make you swear by Yahweh, 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.

⁴  But you shall go to my country, and to my relatives, and take a wife for my son Isaac.'

⁵  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?'

⁶  Abraham said to him, 'Beware that you don't bring my son there again.