1 Chronicles 20:2-3

2When David came, he took the crown off the Ammonite king's head. The crown was made of gold. It weighed 34 kilograms. There was a valuable jewel fixed on it. David's men then put the crown on David's head. David also took a lot of valuable things from the city.

3He brought the people out from the city to do hard work for him. He made them cut wood with saws, and use iron tools and axes. He did the same thing to the people of all the other Ammonite cities. Then David and all his army returned to Jerusalem.