1 Samuel 7:9-10

9So Samuel took a young lamb and offered it to the Lord as a whole burnt offering. He pleaded with the Lord to help Israel, and the Lord answered him.

10Just as Samuel was sacrificing the burnt offering, the Philistines arrived to attack Israel. But the Lord spoke with a mighty voice of thunder from heaven that day, and the Philistines were thrown into such confusion that the Israelites defeated them.