2 Samuel 5:22-25

22The Philistines again came up and spread out in the valley of Rephaim.

23So David asked the Lord what he should do. This time the Lord said to him, “Don’t march straight up. Instead, circle around behind them and come against them opposite the trees.

24When you hear the sound of marching in the tops of the trees, act decisively. For at that moment the Lord is going before you to strike down the army of the Philistines.”

25David did just as the Lord commanded him, and he struck down the Philistines from Gibeon all the way to Gezer.