NET

31 He removed the people who were in it and made them labor with saws, iron picks, and iron axes, putting them to work at the brick kiln. This was his policy with all the Ammonite cities. Then David and all the army returned to Jerusalem.

Darby

31 And he brought out the people that were in it, and put them under the saw, and under harrows of iron, and under axes of iron, and made them pass through the brickkilns. And so did he to all the cities of the children of Ammon. And David and all the people returned to Jerusalem.

KJV

31 And he brought forth the people that [were] therein, and put [them] under saws, and under harrows of iron, and under axes of iron, and made them pass through the brickkiln: and thus did he unto all the cities of the children of Ammon. So David and all the people returned unto Jerusalem.