'Sworn' in the Bible

God do so to Abner, and more also, if, as Jehovah hath sworn to David, I do not even so to him;

And the king called the Gibeonites, and said unto them (now the Gibeonites were not of the children of Israel, but of the remnant of the Amorites; and the children of Israel had sworn unto them: and Saul sought to slay them in his zeal for the children of Israel and Judah);