2 Samuel 12:29-31

29So David assembled all the troops and went to Rabbah; he fought against it and captured it.

30He took the crown from the head of their king, and it was placed on David’s head. The crown weighed seventy-five pounds of gold, and it had a precious stone in it. In addition, David took away a large quantity of plunder from the city.

31He removed the people who were in the city and put them to work with saws, iron picks, and iron axes, and to labor at brickmaking. He did the same to all the Ammonite cities. Then he and all his troops returned to Jerusalem.