'Oath' in the Bible

And they said, We will restore them, and will require nothing of them; so will we do, as thou hast said. And I called the priests, and took an oath of them, that they should do according to this promise.

joined with their brethren, their nobles, and entered into a curse and into an oath, to walk in the law of God, which had been given by Moses the servant of God, and to keep and do all the commandments of Jehovah our Lord, and his ordinances and his statutes;