'Oath' in the Bible

So I called the priests and made them take an oath to fulfill this promise. I also shook my robes, and said, "May God shake out every man from his house and his possessions who does not keep this promise. May he be emptied out and shaken just like this." All the assembly said, "Amen!" and praised the LORD. And the people kept their promise.

joined with their relatives and their leaders. They entered into an oath enforced by a curse to walk in God's Law that was given through God's servant Moses, and to be careful to obey all of the commands of the LORD, our Lord, as well as his regulations and statutes:

So I rebuked them, cursed them, struck some of their men, tore out their hair, and made them take this oath in the name of God: "You are not to give your daughters to their sons nor take their daughters for your sons or for yourselves.