Throughout all the city, to wit, the city of Ekron, during its short stay there. Or, in every city, to wit, where the ark of God came; for it came also to Gaza and Askelon, and produced the same effects there, as may be gathered from 1 Samuel 6:4,17, though for brevity sake it be here omitted.
Related Commentaries of 1 Samuel 5:11
1 Samuel 5:11
11 So they sent and gathered together all the lords of the Philistines, and said, Send away the ark of the God of Israel, and let it go again to his own place, that it slay us not, and our people:a for there was a deadly destruction throughout all the city; the hand of God was very heavy there.