'Oath' in the Bible

Then they said, “We will give it back and will require nothing from them; we will do exactly as you say.” So I called the priests and took an oath from them that they would do according to this promise.

For many in Judah were bound by oath to him because he was the son-in-law of Shecaniah the son of Arah, and his son Jehohanan had married the daughter of Meshullam the son of Berechiah.

are joining with their kinsmen, their nobles, and are taking on themselves a curse and an oath to walk in God’s law, which was given through Moses, God’s servant, and to keep and to observe all the commandments of God our Lord, and His ordinances and His statutes;