1 Chronicles 14:14-15

14David inquired again of God, and God said to him, “You shall not go up after them; circle around 1behind them and come at them in front of the 2balsam trees.

15It shall be when you hear the sound of marching in the tops of the balsam trees, then you shall go out to battle, for God will have gone out before you to strike the army of the Philistines.”