Charles Ellicott Commentary 1 Samuel 6:17

"And these are the golden tumors which the Philistines returned for a trespass-offering unto Jehovah: for Ashdod one, for Gaza one, for Ashkelon one, for Gath one, for Ekron one;" — 1 Samuel 6:17 (ASV)

The golden emerods. —The offering of the golden emerods (or tumours), including one for each of the five principal cities. In the preceding chapter only Ashdod, Gath, and Ekron are mentioned as abiding places of the Ark, but there is no doubt that during the “seven months” the sacred chest was for a long or short period located in each of the five towns, in the Dagon temple which each of the cities possessed.