'Oath' in the Bible

I say, "Keep the king's command!" because of the oath to God.

All things come alike to all. There is one event to the righteous and to the wicked; to the good, to the clean, to the unclean, to him who sacrifices, and to him who doesn't sacrifice. As is the good, so is the sinner; he who takes an oath, as he who fears an oath.