David brought out the people who were there and put them to work with saws, iron picks, and axes. And he did the same to all the Ammonite cities. Then David and all his troops returned to Jerusalem.
Jewish Publication Society of America Version (JPS1917) - 1 Chronicles 20:3 >And he brought forth the people that were therein, and cut them with saws, and with harrows of iron, and with axes. And thus did David unto all the cities of the children of Ammon. And David and all the people returned to Jerusalem.