Bible Verses About Oaths: Confirming covenants

And they answered: We saw that the Lord is with thee, and therefore we said: Let there be an oath between us, and let us make a covenant,

Come, therefore, let us enter into a league; that it may be for a testimony between me and thee.

The God of Abraham, and the God of Nachor, the God of their father, judge between us. And Jacob swore by the fear of his father Isaac:

Jonathan therefore made a covenant with the house of David: and the Lord required it at the hands of David's enemies.

And Jonathan swore again to David, because he loved him: for he loved him as his own soul.