'Oath' in the Bible

When you take an oath before God, put it quickly into effect, because he has no pleasure in the foolish; keep the oath you have taken.

It is better not to take an oath than to take an oath and not keep it.

I say to you, Keep the king's law, from respect for the oath of God.

Because to all there is one event, to the upright man and to the evil, to the clean and to the unclean, to him who makes an offering and to him who makes no offering; as is the good so is the sinner; he who takes an oath is as he who has fear of it.