2 Samuel 5:21 Meaning

19And David enquired of the LORD, saying, Shall I go up to the Philistines? wilt thou deliver them into mine hand? And the LORD said unto David, Go up: for I will doubtless deliver the Philistines into thine hand.

20And David came to Baal-perazim, and David smote them there, and said, The LORD hath broken forth upon mine enemies before me, as the breach of waters. Therefore he called the name of that place Baal-perazim.

21And there they left their images, and David and his men burned them.

22And the Philistines came up yet again, and spread themselves in the valley of Rephaim.

23And when David enquired of the LORD, he said, Thou shalt not go up; but fetch a compass behind them, and come upon them over against the mulberry trees.