2 Samuel 5:22-25

22And the Philistines came yet again, and spread themselves in the valley of Rephaim. 23And when David enquired of the LORD, he said, Thou shalt not go up; but make a circuit behind them, and come upon them in front of the mulberry trees. 24And let it be, when thou hearest the sound of marching in the tops of the mulberry trees, that then thou shalt bestir thyself: for then shall the LORD go out before thee, to smite the host of the Philistines. 25And David did so, as the LORD had commanded him; and smote the Philistines from Geba until thou comest to Gazer.1