Matthew Henry Commentary 1 Samuel 4:10-11

"And the Philistines fought, and Israel was smitten, and they fled every man to his tent: and there was a very great slaughter; for there fell of Israel thirty thousand footmen. And the ark of God was taken; and the two sons of Eli, Hophni and Phinehas, were slain." — 1 Samuel 4:10-11 (ASV)

The taking of the ark was a great judgment upon Israel, and a sure sign of God's displeasure. Let no one think to shelter themselves from the wrath of God under the cloak of outward profession.