18 Now the Philistines had come and spread out in the valley of Reph'aim. 19 And David inquired of the Lord, "Shall I go up against the Philistines? Wilt thou give them into my hand?" And the Lord said to David, "Go up; for I will certainly give the Philistines into your hand." 20 And David came to Ba'al-pera'zim, and David defeated them there; and he said, "The Lord has broken through my enemies before me, like a bursting flood." Therefore the name of that place is called Ba'al-pera'zim. 21 And the Philistines left their idols there, and David and his men carried them away. 22 And the Philistines came up yet again, and spread out in the valley of Reph'aim.
Matthew Henry's Commentary on 2 Samuel 5:18-22
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.