1 Chronicles 20:2-3

20:2 David took the crown from the head of their king and wore it (its weight was a talent of gold and it was set with precious stones). He took a large amount of plunder from the city. 20:3 He removed the city’s residents and made them do hard labor with saws, iron picks, and axes. This was his policy with all the Ammonite cities. Then David and all the army returned to Jerusalem.