And he brought out the people that were in it, and cut them with saws, and with harrows of iron, and with axes. Even so dealt David with all the cities of the children of Ammon. And David and all the people returned to Jerusalem. He brought out the people - See this transaction particularly explained in the notes on the parallel places, 2 Samuel 12:30-31 (note).
Related Commentaries of 1 Chronicles 20:3
1 Chronicles 20:3
3 And he brought out the people that were in it, and cut them with saws, and with harrows of iron, and with axes. Even so dealt David with all the cities of the children of Ammon. And David and all the people returned to Jerusalem.