Deuteronomy 20

Deuteronomy 20:5

What man hath built a new house, and hath not dedicated it? let him return, &c.

If any man have a mind to make excuses of occasions, whereby his heart may be drawn homeward, so as he cannot heartily intend the service of the war; whether it be in matter of purchase, or marriage, or plantation, let him have free liberty to return; for God requires a free and cheerful resolution, in those, which go forth to fight his battles.

Deuteronomy 20:16

Thou shalt save alive nothing that breatheth.

Except they accept the conditions of peace, when they are tendered unto them, thou shalt leave none of the persons or beasts alive.

Deuteronomy 20:19

Thou shalt not destroy the trees thereof.

Thou shalt not destroy any of the trees, that bear fruit for the sustenance of man.