2 Samuel 5:22-25

²²And the Philistines came up yet again, and spread out in the valley of Reph'aim. ²³And when David inquired of the LORD, he said, "You shall not go up; go around to their rear, and come upon them opposite the balsam trees. ²⁴And when you hear the sound of marching in the tops of the balsam trees, then bestir yourself; for then the LORD has gone out before you to smite the army of the Philistines." ²⁵And David did as the LORD commanded him, and smote the Philistines from Geba to Gezer.