'Sworn' in the Bible

Whithersoever they went out, the hand of Jehovah was against them for evil, as Jehovah had spoken, and as Jehovah had sworn unto them: and they were sore distressed.

Now the men of Israel had sworn in Mizpah, 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 Jehovah 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 had sworn, saying, Cursed be he that giveth a wife to Benjamin.