2 Samuel 12:26

(For only Og king of Bashan remained of the remnant of the Rephaim. Behold, his bedstead was an iron bedstead; it is in Rabbah of the sons of Ammon. Its length was nine cubits, and its width four cubits by ordinary cubit.)

Now it happened in the spring, at the time when kings go out to battle, that David sent Joab and his servants with him and all Israel, and they destroyed the sons of Ammon and besieged Rabbah. But David stayed at Jerusalem.

Now it happened that when David had come to Mahanaim, Shobi the son of Nahash from Rabbah of the sons of Ammon, Machir the son of Ammiel from Lo-debar, and Barzillai the Gileadite from Rogelim,

Now it happened in the spring, at the time when kings go out to battle, that Joab led out the force of the military and brought the land of the sons of Ammon to ruin, and came and besieged Rabbah. But David stayed at Jerusalem. And Joab struck Rabbah and tore it down.

“I will make Rabbah a pasture for camels and the sons of Ammon a resting place for flocks. Thus you will know that I am Yahweh.”

Joab Fights Ammon