'Kings' in the Bible

These are the kings who reigned in the land of Edom before any king reigned over the sons (descendants) of Israel (Jacob): Bela the son of Beor; the name of his city was Dinhabah.

So all Israel was enrolled by genealogies; and they are written in the Book of the Kings of Israel. And Judah was carried away into exile to Babylon because of their unfaithfulness [to God].

He allowed no man to oppress or exploit them,And, He reproved and punished kings for their sakes, saying,

The Ammonites came out and lined up in battle formation at the entrance of the city [Medeba], while the kings who had come were by themselves in the open country.

Then it happened at the end of the year, at the time when kings go out to battle, Joab led out the army and ravaged and devastated the land of the Ammonites, and came and besieged Rabbah. But David stayed at Jerusalem [with Bathsheba]. Joab struck Rabbah and overthrew it.