Bible Verses About Oaths: Antiquity of

and Abram saith unto the king of Sodom, `I have lifted up my hand unto Jehovah, God Most High, possessing heaven and earth--

and I cause thee to swear by Jehovah, God of the heavens, and God of the earth, that thou dost not take a wife for my son from the daughters of the Canaanite, in the midst of whom I am dwelling;

and if the woman be not willing to come after thee, then thou hast been acquitted from this mine oath: only my son thou dost not cause to turn back thither.'