2 Samuel 8:2

2He defeated 8:2 I.e. descendants of Lot (Gen 19:37).Moab, and 8:2 In ancient times a conqueror sometimes used an arbitrary system to determine which prisoners to execute.measured them with a length of rope, making them lie down on the ground; he measured two lengths to [choose those to] put to death, and one full length to [choose those to] be kept alive. And the [surviving] Moabites became servants to David, bringing tribute.