In the spring of the year, the time when the kings go out to battle, David sent out Joab and his officers, all of Israel with him. They brought to ruin the Ammonites and besieged Rabbah, but David remained in Jerusalem.
So David replied to the messenger, “Thus you shall report to Joab, ‘Do not allow this thing to dismay you, for the sword devours one as well as another. Sustain your attack against the city and bring it to ruin.’ Encourage him with this reply.”
When David came to Mahanaim, Shobi the son of Nahash from Rabbah of the Ammonites, Machir the son of Ammiel from Lo Debar, and Barzillai the Gileadite from Rogelim
(For only Og, king of Bashan, remained of the remnant of the Rephaim. Behold, his bed was a bed of iron. Is it not in Rabbah of the Ammonites? It is nine cubits long and four cubits wide, according to the cubit of a man.)