2 Samuel 12:29-31

29So David brought all the soldiers of the army together. He led them to Rabbah. They attacked the city and they won against it.

30He 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.

31He 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 also made them work at the brick ovens. He did the same thing to the people of all the other Ammonite cities. Then David and all his army returned to Jerusalem.