All the spoil thereof every whir, for the Lord thy God; rather, all the spoil [booty] thereof as a whole offering unto Jehovah thy God; it was to be wholly devoted to God, and as such to be consumed by fire. "It was a destruction, and not properly an offering. Hence the author selects neither עֹולָה nor חַטָּאת, but כָּליִל, whole, whole offering (Deuteronomy 33:10; Le Deuteronomy 6:15 (22)), which word, in the law concerning offering, is no technical designation of any particular kind of offering. The rendering omnino is untenable" (Knobel). The city was to be made a ruin, never to be rebuilt; and thus was to be treated the same as a heathen, idolatrous city might be (cf. Numbers 21:3).
HOMILETICS