1 Samuel 4:2-3, 10-11

The Philistines attacked and defeated the army of Israel, killing 4,000 men. After the battle was over, the troops retreated to their camp, and the elders of Israel asked, “Why did the LORD allow us to be defeated by the Philistines?” Then they said, “Let’s bring the Ark of the Covenant of the LORD from Shiloh. If we carry it into battle with us, it will save us from our enemies.”

So the Philistines fought desperately, and Israel was defeated again. The slaughter was great; 30,000 Israelite soldiers died that day. The survivors turned and fled to their tents. The Ark of God was captured, and Hophni and Phinehas, the two sons of Eli, were killed.