Bible Verses About Oaths used for Confirming Covenants

And they said, We saw certainly that the LORD was with thee: and we said, Let there be now an oath betwixt us, even betwixt us and thee, and let us make a covenant with thee;

Now therefore come thou, let us make a covenant, I and thou; and let it be for a witness between me and thee.

The God of Abraham, and the God of Nahor, the God of their father, judge betwixt us. And Jacob sware by the fear of his father Isaac.

So Jonathan made a covenant with the house of David, saying, Let the LORD even require it at the hand of David's enemies.

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