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 unto him, Go not up after them; turn away from them, and come upon them over against the mulberry trees.

15And it shall be, when thou shalt hear a sound of going in the tops of the mulberry trees, that then thou shalt go out to battle: for God is gone forth before thee to smite the army of the Philistines.

16David therefore did as God commanded him: and they smote the army of the Philistines from Gibeon even to Gazer.1