'Swore' in the Bible

Saul listened to Jonathan’s advice and swore an oath: “As surely as the Lord lives, David will not be killed.”

But David said, “Your father certainly knows that you have come to look favorably on me. He has said, ‘Jonathan must not know of this, or else he will be grieved.’” David also swore, “As surely as the Lord lives and as you yourself live, there is but a step between me and death.”

Jonathan once again swore to David in his love for him, because he loved him as he loved himself.

So David swore to Saul. Then Saul went back home, and David and his men went up to the stronghold.

Then Saul swore to her by the Lord: “As surely as the Lord lives, nothing bad will happen to you because of this.”