17. Instead, you shall put them to death with the edge of the sword, specifically: the Hittite and the Amorite and the Canaanite, the Perizzite and the Hivite and the Jebusite, just as the Lord your God has commanded you.
18. Otherwise, they may teach you to do all the abominations which they have committed for their own gods. And then you would sin against the Lord your God.
19. When you will have besieged a city for a long time, and you will have encircled it with fortifications, so that you may fight against it, you shall not cut down trees from which one is able to eat, neither shall you cause devastation with axes to the surrounding region. For it is a tree, and not a man. It is not able to increase the number of those who are fighting against you.