18. valley of Rephaim—that is, "of giants," a broad and fertile plain, which descends gradually from the central mountains towards the northwest. It was the route by which they marched against Jerusalem. The "hold" to which David went down "was some fortified place where he might oppose the progress of the invaders," and where he signally defeated them.

     11. they came up to Baal-perazim; and David smote them there—In an engagement fought at Mount Perazim (Isa 28:21), in the valley of Rephaim, a few miles west of Jerusalem, the Philistines were defeated and put to flight.