Here the case is put of a city revolting from its allegiance to the God of Israel, and serving other gods.
I. The crime is supposed to be committed, 1. By one of the cities of Israel, that lay within the jurisdiction of their courts. The church then judged those only that were within, 1 Corinthians 5:12-13. And, even when they were ordered to preserve their religion in the first principles of it by fire and sword to propagate it. Those that are born within the allegiance of a prince, if they take up arms against him, are dealt with as traitors, but foreign invaders are not so. The city that is here supposed to have become idolatrous is one that formerly worshipped the true God, but had now withdrawn to other gods, which intimates how great the crime is, and how sore the punishment will be, of those that, after they have known the way of righteousness, turn aside from it, 2 Peter 2:21. 2. It is supposed to be committed by the generality of the inhabitants of the city, for we may conclude that, if a considerable number did retain their integrity, those only that were guilty were to be destroyed, and the city was to be spared for the sake of the righteous in it; for will not the Judge of all the earth do right? No doubt he will. 3. They are supposed to be drawn to idolatry by certain men, the children of Belial, men that would endure no yoke (so it signifies), that neither fear God nor regard man, but shake off all restraints of law and conscience, and are perfectly lost to all manner of virtue; these are those that say, "Let us serve other gods," that will not only allow, but will countenance and encourage, our immoralities. Belial is put for the devil (2 Corinthians 6:15), and the children of Belial are his children. These withdraw the inhabitants of the city; for a little of this old leaven, when it is entertained, soon leavens the whole lump.
II. The cause is ordered to be tried with a great deal of care (Deuteronomy 13:14): Thou shalt enquire and make search. They must not proceed upon common fame, or take the information by hearsay, but must examine the proofs, and not give judgment against them unless the evidence was clear and the charge fully made out. God himself, before he destroyed Sodom, is said to have come down to see whether its crimes were according to the clamour, Genesis 18:21. In judicial processes it is requisite that time, and care, and pains, be taken to find out the truth, and that search be made without any passion, prejudice, or partiality. The Jewish writers say that, though particular persons who were idolaters might be judged by the inferior courts, the defection of a city was to be tried by the great Sanhedrim; and, if it appeared that they were thrust away to idolatry, two learned men were sent to them to admonish and reclaim them. If they repented, all would be well; if not, then all Israel must go up to war against them, to testify their indignation against idolatry and to stop the spreading of the contagion.
III. If the crime were proved, and the criminals were incorrigible, the city was to be wholly destroyed. If there were a few righteous men in it, no doubt they would remove themselves and their families out of such a dangerous place, and then all the inhabitants, men, women, and children, must be put to the sword (Deuteronomy 13:15), all the spoil of the city, both shop-goods and the furniture of houses, must be brought into the marketplace and burned, and the city itself must be laid in ashes and never built again, Deuteronomy 13:16. The soldiers are forbidden, upon pain of death, to convert any of the plunder to their own use, Deuteronomy 13:17. It was a devoted thing, and dangerous to meddle with, as we find in the case of Achan. Now, 1. God enjoins this severity of show what a jealous God he is in the matters of his worship, and how great a crime it is to serve other gods. Let men know that God will not give his glory to another, nor his praise to graven images. 2. He expects that magistrates, having their honour and power from him, should be concerned for his honour, and use their power for terror to evil doers, else they bear the sword in vain. 3. The faithful worshippers of the true God must take all occasions to show their just indignation against idolatry, much more against atheism, infidelity, and irreligion. 4. It is here intimated that the best expedient for the turning away of God's anger from a land is to execute justice upon the wicked of the land (Deuteronomy 13:17), that the Lord may turn from the fierceness of his anger, which was ready to break out against the whole nation, for the wickedness of that one apostate city. It is promised that, if they would thus root wickedness out of their land, God would multiply them. They might think it impolitic, and against the interest of their nation, to ruin a whole city for a crime relating purely to religion, and that they should be more sparing of the blood of Israelites: "Fear not that" (says Moses), "God will multiply you the more; the body of your nation will lose nothing by the letting out of this corrupt blood." Lastly, Though we do not find this law put in execution in all the history of the Jewish church (Gibeah was destroyed, not for idolatry, but immorality), yet for the neglect of the execution of it upon the inferior cities that served idols God himself, by the army of the Chaldeans, put it in execution upon Jerusalem, the head city, which, for is apostasy from God, was utterly destroyed and laid waste, and lay in ruins seventy years. Though idolaters may escape punishment from men (nor is this law in the letter of it binding now, under the gospel), yet the Lord our God will not suffer them to escape his righteous judgements. The New Testament speaks of communion with idolaters as a sin which, above any other, provokes the Lord to jealousy, and dares him as if we were stronger than he, 1 Corinthians 10:21-22.