17 When the Philistines heard that David had been anointed king over Israel, all the Philistines went up in search of David; but David heard about it and went down to the stronghold. 18 Now the Philistines had come and spread out in the valley of Rephaim. 19 David inquired of the Lord, "Shall I go up against the Philistines? Will you give them into my hand?" The Lord said to David, "Go up; for I will certainly give the Philistines into your hand." 20 So David came to Baal-perazim, and David defeated them there. He said, "The Lord has burst forth against my enemies before me, like a bursting flood." Therefore that place is called Baal-perazim. 21 The Philistines abandoned their idols there, and David and his men carried them away. 22 Once again the Philistines came up, and were spread out in the valley of Rephaim. 23 When David inquired of the Lord, he said, "You shall not go up; go around to their rear, and come upon them opposite the balsam trees. 24 When you hear the sound of marching in the tops of the balsam trees, then be on the alert; for then the Lord has gone out before you to strike down the army of the Philistines." 25 David did just as the Lord had commanded him; and he struck down the Philistines from Geba all the way to Gezer.
Matthew Henry's Commentary on 2 Samuel 5:17-25
Commentary on 2 Samuel 5:17-25
(Read 2 Samuel 5:17-25)
The Philistines considered not that David had the presence of God with him, which Saul had forfeited and lost. The kingdom of the Messiah, as soon as it was set up in the world, was thus attacked by the powers of darkness. The heathen raged, and the kings of the earth set themselves to oppose it; but all in vain, Acts 2:2.