It happened, at the time of the return of the year, at the time when kings go out [to battle], that Joab led forth the army, and wasted the country of the children of Ammon, and came and besieged Rabbah. But David stayed at Jerusalem. Joab struck Rabbah, and overthrew it.
"And it came to pass at the time of the return of the year, at the time when kings go out to battle, that Joab led forth the army, and wasted the country of the children of Ammon, and came and besieged Rabbah.  But David tarried at Jerusalem.  And Joab smote Rabbah, and overthrew it.  And David took the crown of their king from off his head, and found in it the weight of a talent of gold; and there were precious stones in it; and it was set upon David's head: and he brought forth the spoil of the city, exceeding much.  And he brought forth the people that were therein, and cut them with saws and harrows of iron, and with axes.  And thus did David to all the cities of the children of Ammon.  And David and all the people returned to Jerusalem."