'Guilt offering' in the Bible

They said, "If you [are] sending the ark of the God of Israel away, you must not send it away empty, but by all means return it with a guilt offering. Then you will be healed and it will become known to you why his hand [is] not turned aside from you."

And they said, "What [is] the guilt offering that we should return to him?" They said, "The number of the rulers of [the] Philistines [is] five. Therefore send five gold tumors and five gold mice, because one plague [was] on all of you and all your rulers.

And you must take the ark of Yahweh and place it on the utility cart with the gold objects that you [are] returning to him as a guilt offering. You must place [them] in the container beside [the ark] and then send it [off] so that it goes away.

Now these [are] the gold tumors which [the] Philistines returned [as] a guilt offering to Yahweh: one for Ashdod, one for Gaza, one for Ashkelon, one for Gath, one for Ekron.