Deuteronomy 13:16-17

161Then you shall gather all its booty into the middle of its open square and burn the city and all its booty with fire as a whole burnt offering to the Lord your God; and it shall be a 23ruin forever. It shall never be rebuilt.

17Nothing from that which is put under the ban shall cling to your hand, in order that the Lord may turn from 4His burning anger and 5show mercy to you, and have compassion on you and 6make you increase, just 7as He has sworn to your fathers,