When the Philistines heard that David had been anointed king over all Israel, they went up in full force to search for him, but David heard about it and went out to meet them.
so David enquired of God: "Shall I go and attack the Philistines? Will you hand them over to me?" The LORD answered him, "Go, I will hand them over to you."
So David and his men went up to Baal Perazim, and there he defeated them. He said, "As waters break out, God has broken out against my enemies by my hand." So that place was called Baal Perazim.
As soon as you hear the sound of marching in the tops of the balsam trees, move out to battle, because that will mean God has gone out in front of you to strike the Philistine army."