1 Samuel 7:7-9

7When the Philistines heard that the Israelites had gathered at Mizpah, their rulers marched up toward Israel. And when the Israelites learned of this, they feared the Philistines 8and said to Samuel, “Do not stop crying out to the LORD our God for us, that He may save us from the hand of the Philistines.”

9Then Samuel took a suckling lamb and offered it as a whole burnt offering to the LORD. He cried out to the LORD on behalf of Israel, and the LORD answered him.