Ambush the enemy

2 Samuel 5:23-25 (KJV)
²³ And when David enquired of the LORD, he said, Thou shalt not go up; but fetch a compass behind them, and come upon them over against the mulberry trees.
²⁴ And let it be, when thou hearest the sound of a going 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.
²⁵ And David did so, as the LORD had commanded him; and smote the Philistines from Geba until thou come to Gazer.