New American Standard Bible (NASB)
Deuteronomy 20
15 Thus you shall do to all the cities that are very far from you, which are not of the cities of these nations nearby.
16 Only in the cities of these peoples that the Lord your God is giving you as an inheritance, you shall not leave alive anything that breathes.
17 But you shall utterly destroy them, the Hittite and the Amorite, the Canaanite and the Perizzite, the Hivite and the Jebusite, as the Lord your God has commanded you,
18 so that they may not teach you to do according to all their detestable things which they have done for their gods, so that you would sin against the Lord your God.
19 "When you besiege a city a long time, to make war against it in order to capture it, you shall not destroy its trees by swinging an axe against them; for you may eat from them, and you shall not cut them down. For is the tree of the field a man, that it should be besieged by you?
20 Only the trees which you know are not fruit trees you shall destroy and cut down, that you may construct siegeworks against the city that is making war with you until it falls.
Deuteronomy 21
1 "If a slain person is found lying in the open country in the land which the Lord your God gives you to possess, and it is not known who has struck him,
2 then your elders and your judges shall go out and measure the distance to the cities which are around the slain one.
3 It shall be that the city which is nearest to the slain man, that is, the elders of that city, shall take a heifer of the herd, which has not been worked and which has not pulled in a yoke;
4 and the elders of that city shall bring the heifer down to a valley with running water, which has not been plowed or sown, and shall break the heifer’s neck there in the valley.
5 Then the priests, the sons of Levi, shall come near, for the Lord your God has chosen them to serve Him and to bless in the name of the Lord; and every dispute and every assault shall be settled by them.