2 Samuel 12:26
Meanwhile, Joab attacked the Ammonite city of Rabbah and captured its stronghold.
Deuteronomy 3:11
Only King Og of Bashan remained from the remnants of the Rephaim. In fact, his bed was made of iron. It's in Rabbah of the Ammonites, isn't it? It was nine cubits long and four cubits wide."
1 Chronicles 20:1-3
Later the next spring, at the time that kings go out to fight, Joab led out the army, ravaged the territory of the Ammonites, and then went out and attacked Rabbah, while David remained behind in Jerusalem. Joab besieged Rabbah and conquered it.
2 Samuel 11:25
David responded to the messenger, "Here's what you're to tell Joab: "Don't be troubled by this incident, because the battle sword consumes one or another from time to time. Consolidate your attack against the city and conquer it.' Be sure to encourage him."