And they said, “What is the guilt offering that we shall return to him?” They answered, “Five golden tumors and five golden mice, according to the number of the lords of the Philistines, for the same plague was on all of you and on your lords.
The first words of the chapter tell us how long the captivity of the ark continued - it was in the country of the Philistines seven months. In the field of the Philistines (so it is in the original), from which some gather that, having tried it in all their cities, and found it a plague to the inhabitants of each, at length they sent...
Commenting on 1 Samuel 6:1-9
Then said they, what shall be the trespass offering which we shall return to him?.... They paid a great deference to their priests and diviners, and were willing to be directed in all things by them; being ignorant of what was most proper in this case, and might be acceptable to the God of Israel: they answered, five golden emerods, and five golden mice; images...
Five golden emerods--Votive or thank offerings were commonly made by the heathen in prayer for, or gratitude after, deliverance from lingering or dangerous disorders, in the form of metallic (generally silver) models or images of the diseased parts of the body. This is common still in Roman Catholic countries, as well as in the temples of the Hindus and other modern heathen.