So Joshua smote all the land, the hill country, the South, the lowland, and the slopes, and all their kings. He left none remaining, but utterly destroyed all that breathed, as the Lord, the God of Israel, commanded. [Deut. 20:16.]
And when the Lord your God gives them over to you and you smite them, then you must utterly destroy them. You shall make no covenant with them, or show mercy to them.
And they burned the city with fire and all that was in it; only the silver, the gold, and the vessels of bronze and of iron they put into the treasury of the house of the Lord.