2 Samuel 12:29-31

29So David gathered all the men together and went to Rabbah, then fought against it and captured it.

30And he took the crown of their king from his head; it weighed a talent of gold, and [set in it was] a precious stone; and it was placed on David’s head. And he brought the spoil out of the city in great amounts.

31He also brought out the people who were there, and put them to [work with] the saws and sharp iron instruments and iron axes, and made them work at the brickkiln. And he did this to all the Ammonite cities. Then David and all the men returned to Jerusalem.