| 2 Samuel 12:31New Century VersionHe also brought out the people of the city and forced them to work with saws, iron picks, and axes. He also made them build with bricks. David did this to all the Ammonite cities. Then David and all his army returned to Jerusalem.See the chapter | 
He also defeated the people of Moab. He made them lie on the ground, and then he used a rope to measure them. Those who were measured within two rope lengths were killed, but those who were within the next rope length were allowed to live. So the people of Moab became servants of David and gave him the payment he demanded.