'Kings' in the Bible

These were the kings who reigned in the land of Edom before any king ruled over the Israelites: Bela son of Beor; the name of his city was Dinhabah.

He let no one oppress them, he disciplined kings for their sake,

The Ammonites marched out and were deployed for battle at the entrance to the city, while the kings who had come were by themselves in the field.

In the spring, at the time when kings normally conduct wars, Joab led the army into battle and devastated the land of the Ammonites. He went and besieged Rabbah, while David stayed in Jerusalem. Joab defeated Rabbah and tore it down.