In the spring of the year, when kings normally go out to war, David sent Joab and the Israelite army to fight the Ammonites. They destroyed the Ammonite army and laid siege to the city of Rabbah. However, David stayed behind in Jerusalem.
“Well, tell Joab not to be discouraged,” David said. “The sword devours this one today and that one tomorrow! Fight harder next time, and conquer the city!”
When David arrived at Mahanaim, he was warmly greeted by Shobi son of Nahash, who came from Rabbah of the Ammonites, and by Makir son of Ammiel from Lo-debar, and by Barzillai of Gilead from Rogelim.
And I will turn the city of Rabbah into a pasture for camels, and all the land of the Ammonites into a resting place for sheep and goats. Then you will know that I am the Lord.
(King Og of Bashan was the last survivor of the giant Rephaites. His bed was made of iron and was more than thirteen feet long and six feet wide. It can still be seen in the Ammonite city of Rabbah.)