1 Samuel 4:10-11 NIV

10 So the Philistines fought, and the Israelites were defeated1 and every man fled to his tent. The slaughter was very great; Israel lost thirty thousand foot soldiers.

References for 1 Samuel 4:10

11 The ark of God was captured, and Eli's two sons, Hophni and Phinehas, died.2

References for 1 Samuel 4:11