'Sworn' in the Bible

thus doth God to Abner, and thus He doth add to him, surely as Jehovah hath sworn to David -- surely so I do to him:

And now, rise, go out and speak unto the heart of thy servants, for by Jehovah I have sworn, that -- thou art not going out -- there doth not lodge a man with thee to-night; and this is worse for thee than all the evil that hath come upon thee from thy youth till now.'

And the king calleth for the Gibeonites, and saith unto them -- as to the Gibeonites, they are not of the sons of Israel, but of the remnant of the Amorite, and the sons of Israel had sworn to them, and Saul seeketh to smite them in his zeal for the sons of Israel and Judah --