Genesis 24:2-3

2And Abraham said to his servant, the eldest of his house, who ruled over all that he had, Put thy hand, I pray thee, under my thigh,

3and I will make thee swear by Jehovah, the 1God of the heavens and the 2God of the earth, that thou take not a wife for my son of the daughters of the Canaanites, among whom I am dwelling;