17 And when the Philistines heard that they had anointed David king over Israel, all the Philistines went up to seek David; and David heard of it, and went down to the stronghold. 18 Now the Philistines had come and spread themselves in the valley of Rephaim. 19 And David inquired of Jehovah, saying, Shall I go up against the Philistines? wilt thou deliver them into my hand? And Jehovah said unto David, Go up; for I will certainly deliver the Philistines into thy hand.
Matthew Henry's Commentary on 2 Samuel 5:17-19
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.