1 Samuel 7:7-9

When the Philistine rulers heard that Israel had gathered at Mizpah, they mobilized their army and advanced. The Israelites were badly frightened when they learned that the Philistines were approaching. “Don’t stop pleading with the LORD our God to save us from the Philistines!” they begged Samuel. So 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.