And when you hear the sound of marching in the tops of the balsam trees, then rouse yourself, for then the LORD has gone out before you to strike down the army of the Philistines.”
The particular service for which David was raised up was to save Israel out of the hand of the Philistines, Sa2 3:18. This therefore divine Providence, in the first place, gives him an opportunity of accomplishing. Two great victories obtained over the Philistines we have here an account of, by which David not only balanced the disgrace and retrieved the loss Israel had sustained in...
Commenting on 2 Samuel 5:17-25
the sound of a going in the tops of the mulberry trees--now generally thought not to be mulberry trees, but some other tree, most probably the poplar, which delights in moist situations, and the leaves of which are rustled by the slightest movement of the air [ROYLE]. Next: 2 Samuel Chapter 6
When thou hearest the sound of a going - If there had not been an evident supernatural interference, David might have thought that the sleight or ruse de guerre which he had used was the cause of his victory. By the going in the tops of the mulberry trees probably only a rustling among the leaves is intended.