10 'When thou drawest near unto a city to fight against it, then thou hast called unto it for Peace, 11 and it hath been, if Peace it answer thee, and hath opened to thee, then it hath come to pass—all the people who are found in it are to thee for tributaries, and have served thee. 12 'And if it doth not make peace with thee, and hath made with thee war, then thou hast laid siege against it, 13 and Jehovah thy God hath given it into thy hand, and thou hast smitten every male of it by the mouth of the sword. 14 Only, the women, and the infants, and the cattle, and all that is in the city, all its spoil, thou dost seize for thyself, and thou hast eaten the spoil of thine enemies which Jehovah thy God hath given to thee. 15 So thou dost do to all the cities which are very far off from thee, which are not of the cities of these nations. 16 'Only, of the cities of these peoples which Jehovah thy God is giving to thee 'for' an inheritance, thou dost not keep alive any breathing; 17 for thou dost certainly devote the Hittite, and the Amorite, the Canaanite, and the Perizzite, the Hivite, and the Jebusite, as Jehovah thy God hath commanded thee, 18 so that they teach you not to do according to all their abominations which they have done to their gods, and ye have sinned against Jehovah your God.
Matthew Henry's Commentary on Deuteronomy 20:10-18
Commentary on Deuteronomy 20:10-12
(Read Deuteronomy 20:10-12)
The Israelites are here directed about the nations on whom they made war. Let this show God's grace in dealing with sinners. He proclaims peace, and beseeches them to be reconciled. Let it also show us our duty in dealing with our brethren. Whoever are for war, we must be for peace. Of the cities given to Israel, none of their inhabitants must be left. Since it could not be expected that they should be cured of their idolatry, they would hurt Israel. These regulations are not the rules of our conduct, but Christ's law of love. The horrors of war must fill the feeling heart with anguish upon every recollection; and are proofs of the wickedness of man, the power of Satan, and the just vengeance of God, who thus scourges a guilty world. But how dreadful their case who are engaged in unequal conflict with their Maker, who will not submit to render him the easy tribute of worship and praise! Certain ruin awaits them. Let neither the number nor the power of the enemies of our souls dismay us; nor let even our own weakness cause us to tremble or to faint. The Lord will save us; but in this war let none engage whose hearts are fond of the world, or afraid of the cross and the conflict. Care is here taken that in besieging cities the fruit-trees should not be destroyed. God is a better friend to man than he is to himself; and God's law consults our interests and comforts; while our own appetites and passions, which we indulge, are enemies to our welfare. Many of the Divine precepts restrain us from destroying that which is for our life and food. The Jews understand this as forbidding all wilful waste upon any account whatsoever. Every creature of God is good; as nothing is to be refused, so nothing is to be abused. We may live to want what we carelessly waste.