IV. He directs him in what method to make this enquiry and prosecution. 1. He must sanctify the people, now over-night, that is, as it is explained, he must command them to sanctify themselves, v. 13. And what can either magistrates or ministers do more towards sanctification? They must put themselves into a suitable frame to appear before God and submit to the divine scrutiny, must examine themselves, now that God was coming to examine them, must prepare to meet their God. They were called to sanctify themselves when they were to receive the divine law (Exod. xix.), and now also when they were to come under the divine judgment; for in both God is to be attended with the utmost reverence. "There is an accursed thing in the midst of you, and therefore sanctify yourselves," that is, Let all that are innocent be able to clear themselves, and be the more careful to cleanse themselves. The sin of others may be improved by us as furtherances of our sanctification, as the scandal of the incestuous Corinthian occasioned a blessed reformation in that church, 2 Cor. vii. 11. 2. He must bring them all under the scrutiny of the lot (v. 14); the tribe which the guilty person was of should first be discovered by lot, then the family, then the household, and last of all the person. The conviction came upon him thus gradually that he might have some space given him to come in and surrender himself; for God is not willing that any should perish, but that all should come to repentance. Observe, The Lord is said to take the tribe, and family, and household, on which the lot fell, because the disposal of the lot is of the Lord, and, however casual it seems, is under the direction of infinite wisdom and justice; and to show that when the sin of sinners finds them out God is to be acknowledged in it; it is he that seizes them, and the arrests are in his name. God hath found out the iniquity of thy servants, Gen. xliv. 16. It is also intimated with what a certain and unerring judgment the righteous God does and will distinguish between the innocent and the guilty, so that though for a time they seem involved in the same condemnation, as the whole tribe did when it was first taken by the lot, yet he who has his fan in his hand will effectually provide for the taking out of the precious from the vile; so that though the righteous be of the same tribe, and family, and household, with the wicked, yet they shall never be treated as the wicked, Gen. xviii. 25. 3. When the criminal was found out he must be put to death without mercy (Heb. x. 28), and with all the expressions of a holy detestation, v. 15. He and all that he has must be burnt with fire, that there might be no remainders of the accursed thing among them; and the reason given for this severe sentence is because the criminal has, (1.) Given a great affront to God: He has transgressed the covenant of the Lord, who is jealous particularly for the honour of the holy covenant. (2.) He has done a great injury to the church of God: He has wrought folly in Israel, has shamed that nation which is looked upon by all its neighbours to be a wise and understanding people, has infected that nation which is sanctified to God, and troubled that nation of which he is the protector. These being crimes so heinous in their nature, and of such pernicious consequence and example, the execution, which otherwise would have come under the imputation of cruelty, is to be applauded as a piece of necessary justice. It was sacrilege; it was invading God's rights, alienating his property, and converting to a private use that which was devoted to his glory and appropriated to the service of his sanctuary—this was the crime to be thus severely punished, for warning to all people in all ages to take heed how they rob God.