You shall gather all its spoil into the midst of its open square and burn the city and all its spoil with fire, as a whole burnt offering to the LORD your God. It shall be a heap forever. It shall not be built again.
16. And thou shalt gather all the spoil of it. They are commanded to burn all the furniture, and whatever is found in the city; and the reason is subjoined, because it is accursed (anathema) If any city was taken in war, all that God here commands to be burnt was to be counted as spoil, for the Jews would pollute themselves by its very touch.
Here the case is put of a city revolting from its allegiance to the God of Israel, and serving other gods. I. The crime is supposed to be committed, 1. By one of the cities of Israel, that lay within the jurisdiction of their courts. The church then judged those only that were within, Co1 5:12, Co1 5:13.
Commenting on Deuteronomy 13:12-18
And thou shall gather all the spoil of it into the midst of the street thereof,.... All the wealth and substance of the inhabitants, their household goods, shop goods, merchandise, utensils in trade and business, and everything that can be named.