1 Samuel 4:2-3, 10-11

The Philistines drew up in battle array to meet Israel. When the battle spread, Israel was defeated before the Philistines who killed about four thousand men on the battlefield. When the people came into the camp, the elders of Israel said, “Why has the LORD defeated us today before the Philistines? Let us take to ourselves from Shiloh the ark of the covenant of the LORD, that it may come among us and deliver us from the power of our enemies.”

So the Philistines fought and Israel was defeated, and every man fled to his tent; and the slaughter was very great, for there fell of Israel thirty thousand foot soldiers. And the ark of God was taken; and the two sons of Eli, Hophni and Phinehas, died.