2 Samuel 5:22-24

22But the Philistines marched up and spread out in the valley of Rephaim again.

23When David inquired of Adonai, He said, “Do not go up; instead circle around behind them and attack them in front of the balsam trees.

24Now it will be when you hear the sound of marching in the tops of the balsam trees, then you must act, for then Adonai will have gone out before you to strike the camp of the Philistines.