1 Samuel 4:1-11 (NIV)

1 Now the Israelites went out to fight against the Philistines. The Israelites camped at Ebenezer, and the Philistines at Aphek. 2 The Philistines deployed their forces to meet Israel, and as the battle spread, Israel was defeated by the Philistines, who killed about four thousand of them on the battlefield. 3 When the soldiers returned to camp, the elders of Israel asked, “Why did the Lord bring defeat on us today before the Philistines? Let us bring the ark of the Lord’s covenant from Shiloh, so that he may go with us and save us from the hand of our enemies.” 4 So the people sent men to Shiloh, and they brought back the ark of the covenant of the Lord Almighty, who is enthroned between the cherubim. And Eli’s two sons, Hophni and Phinehas, were there with the ark of the covenant of God. 5 When the ark of the Lord’s covenant came into the camp, all Israel raised such a great shout that the ground shook. 6 Hearing the uproar, the Philistines asked, “What’s all this shouting in the Hebrew camp?” When they learned that the ark of the Lord had come into the camp, 7 the Philistines were afraid. “A god has come into the camp,” they said. “Oh no! Nothing like this has happened before. 8 We’re doomed! Who will deliver us from the hand of these mighty gods? They are the gods who struck the Egyptians with all kinds of plagues in the wilderness. 9 Be strong, Philistines! Be men, or you will be subject to the Hebrews, as they have been to you. Be men, and fight!” 10 So the Philistines fought, and the Israelites were defeated and every man fled to his tent. The slaughter was very great; Israel lost thirty thousand foot soldiers. 11 The ark of God was captured, and Eli’s two sons, Hophni and Phinehas, died.

1 Samuel 7:2-4 NIV

Then all the people of Israel turned back to the Lord. 3 So Samuel said to all the Israelites, “If you are returning to the Lord with all your hearts, then rid yourselves of the foreign gods and the Ashtoreths and commit yourselves to the Lord and serve him only, and he will deliver you out of the hand of the Philistines.” 4 So the Israelites put away their Baals and Ashtoreths, and served the Lord only.