1 Chronicles 14:13-16

13And the Philistines yet again spread themselves abroad in the valley. 14Therefore David enquired again of God; and God said to him, Go not up after them; turn away from them, and come upon them in front of the mulberry trees. 15And it shall be, when thou shalt hear a sound of marching in the tops of the mulberry trees, then thou shalt go out to battle: for God hath gone forth before thee to smite the host of the Philistines. 16David therefore did as God commanded him: and they smote the host of the Philistines from Gibeon even to Gazer.1