2 Samuel 12:30
Then he took the crown from the head of their king. It weighed a talent of gold 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.

2 Samuel 12:31
David brought out the people who were there and put them to work with saws, iron picks, and axes, and he made them work at the brick kilns. He did the same to all the Ammonite cities. Then David and all his troops returned to Jerusalem.