'Sworn' in the Bible

Whithersoever they went out, the hand of the LORD was against them for evil, as the LORD had said, and as the LORD had sworn unto them: and they were greatly distressed.

Now the men of Israel had sworn in Mizpeh, saying, There shall not any of us give his daughter unto Benjamin to wife.

How shall we do for wives for them that remain, seeing we have sworn by the LORD that we will not give them of our daughters to wives?

Howbeit we may not give them wives of our daughters: for the children of Israel have sworn, saying, Cursed be he that giveth a wife to Benjamin.