Deuteronomy 13:16-17

16You must put all the valuable things in a heap in the town's public place. Then burn down the whole town as an offering to the Lord your God. Leave the town as a heap of stones. Nobody must ever build it again.

17You must not keep any of the valuable things for yourselves. They have been given to the Lord. If you destroy the whole town, the Lord will stop being angry. He will be kind to you and he will forgive you. He will cause you to grow into a big nation, as he promised your ancestors.