2 Samuel 5:17-21

When the Philistines got word that David had been made king over all Israel, they came on the hunt for him. David heard of it and went down to the stronghold. When the Philistines arrived, they deployed their forces in Rephaim Valley. Then David prayed to GOD: “Shall I go up and fight the Philistines? Will you help me beat them?” “Go up,” GOD replied. “Count on me. I’ll help you beat them.” David then went straight to Baal Perazim, and smashed them to pieces. Afterward David said, “GOD exploded on my enemies like a gush of water.” That’s why David named the place Baal Perazim (The-Master-Who-Explodes). The retreating Philistines dumped their idols, and David and his soldiers took them away.