'Sworn' in the Bible

In whose eyes the depraved person is contemned, and who honoureth them that fear Jehovah; who, if he have sworn to his own hurt, changeth it not;

I have made a covenant with mine elect, I have sworn unto David my servant:

Once have I sworn by my holiness; I will not lie unto David:

Jehovah hath sworn, and will not repent, Thou art priest for ever after the order of Melchisedek.

I have sworn, and I will perform it, that I will keep thy righteous judgments.

Jehovah hath sworn in truth unto David; he will not turn from it: Of the fruit of thy body will I set upon thy throne;