1 Chronicles 14:14-15

14Therefore David inquired again of God, and God said to him, “You shall not go up after them; circle around them, and come upon them in front of the mulberry trees.

15And it shall be, when you hear a sound of marching in the tops of the mulberry trees, then you shall go out to battle, for God has gone out before you to strike the camp of the Philistines.”