2 Samuel 8:1-4

1Now afterward David attacked the Philistines and subdued them, and took Metheg-ammah from the hand of the Philistines.

2He also defeated Moab. He made them lie down on the ground and measured them with a cord. Every two measures of them were put to death, and the third measure was kept alive. So the Moabites became vassals to David, bringing tribute.

3David also defeated King Hadadezer son of Rehob of Zobah, as he went to restore his dominion along the River.

4David captured from him 1700 horsemen and 20,000 foot soldiers, and David hamstrung all the chariot horses, while reserving 100 of them for chariots.