1 Chronicles 20:1-3

1In the spring,1 at the time when kings march out to war, Joab led out the army and ravaged the land of the Ammonites. He came to Rabbah and besieged it, but David remained in Jerusalem. And Joab attacked Rabbah and demolished it.

2Then David took the crown from the head of their king.2 It was found to weigh a talent of gold3 and was set with precious stones, and it was placed on David’s head. And David took a great amount of plunder from the city.

3David brought out the people who were there and put them to work4 with saws, iron picks, and axes. And he did the same to all the Ammonite cities. Then David and all his troops returned to Jerusalem.