Care had been taken by some preceding laws for the vigorous and effectual persecution of a wilful murderer (Deu 19:11 etc.), the putting of whom to death was the putting away of the guilt of blood from the land; but if this could not be done, the murderer not being discovered, they must not think that the land was in no danger of contracting any pollution because it was not through any neglect of theirs that the murderer was unpunished; no, a great solemnity is here provided for the putting away of the guilt, as an expression of their dread and detestation of that sin. I. The case supposed is that one is found slain, and it is not known who slew him, Deu 21:1. The providence of God has sometimes wonderfully brought to light these hidden works of darkness, and by strange occurrences the sin of the guilty has found them out, insomuch that it has become a proverb, Murder will out. But it is not always so; now and then the devil's promises of secresy and impunity in this world are made good; yet it is but for a while: there is a time coming when secret murders will be discovered; the earth shall disclose her blood (Isa 26:21), upon the inquisition which justice makes for it; and there is an eternity coming when those that escaped punishment from men will lie under the righteous judgment of God. And the impunity with which so many murders and other wickednesses are committed in this world makes it necessary that there should be a day of judgment, to require that which is past, Ecc 3:15. II. Directions are given concerning what is to be done in this case. Observe, 1. It is taken for granted that a diligent search had been made for the murderer, witnesses examined, and circumstances strictly enquired into, that if possible they might find out the guilty person; but if, after all, they could not trace it out, not fasten the charge upon any, then, (1.) The elders of the next city (that had a court of three and twenty in it) were to concern themselves about this matter. If it were doubtful which city was next, the great sanhedrim were to send commissioners to determine that matter by an exact measure, Deu 21:2, Deu 21:3. Note, Public persons must be solicitous about the public good; and those that are in power and reputation in cities must lay out themselves to redress grievances, and reform what is amiss in the country and neighbourhood that lie about them. Those that are next to them should have the largest share of their good influence, as ministers of God for good. (2.) The priests and Levites must assist and preside in this solemnity (Deu 21:5), that they might direct the management of it in all points according to the law, and particularly might be the people's mouth to God in the prayer that was to be put up on this sad occasion, Deu 21:8. God being Israel's King, his ministers must be their magistrates, and by their word, as the mouth of the court and learned in the laws, every controversy must be tried. It was Israel's privilege that they had such guides, overseers, and rulers, and their duty to make use of them upon all occasions, especially in sacred things, as this was. (3.) They were to bring a heifer down into a rough and unoccupied valley, and to kill it there, Deu 21:3, Deu 21:4. This was not a sacrifice (for it was not brought to the altar), but a solemn protestation that thus they would put the murderer to death if they had him in their hands. The heifer must be one that had not drawn in the yoke, to signify (say some) that the murderer was a son of Belial; it must be brought into a rough valley, to signify the horror of the fact, and that the defilement which blood brings upon a land turns it into barrenness. And the Jews say that unless, after this, the murderer was found out, this valley where the heifer was killed was never to be tilled nor sown. (4.) The elders were to wash their hands in water over the heifer that was killed, and to profess, not only that they had not shed this innocent blood themselves, but that they knew not who had (Deu 21:6, Deu 21:7), nor had knowingly concealed the murderer, helped him to make his escape, or been any way aiding or abetting. To this custom David alludes, Psa 26:6, I will wash my hands in innocency; but if Pilate had any eye to it (Mat 27:24) he wretchedly misapplied it when he condemned Christ, knowing him to be innocent, and yet acquitted himself from the guilt of innocent blood. Protestatio non valet contra factum - Protestations are of no avail when contradicted by fact. (5.) The priests were to pray to God for the country and nation, that God would be merciful to them, and not bring upon them the judgments which the connivance at the sin of murder would deserve. It might be presumed that the murderer was either one of their city or was now harboured in their city; and therefore they must pray that they might not fare the worse for his being among them, Num 16:22. Be merciful, O Lord, to thy people Israel, Deu 21:8. Note, When we hear of the wickedness of the wicked we have need to cry earnestly to God for mercy for our land, which groans and trembles under it. We must empty the measure by our prayers which others are filling by their sins. Now, 2. This solemnity was appointed, (1.) That it might give occasion to common and public discourse concerning the murder, which perhaps might some way or other occasion the discovery of it. (2.) That it might possess people with a dread of the guilt of blood, which defiles not only the conscience of him that sheds it (this should engage us all to pray with David, Deliver me from blood-guiltiness), but the land in which it is shed; it cries to the magistrate for justice on the criminal, and, if that cry be not heard, it cries to heaven for judgment on the land. If there must be so much care employed to save the land from guilt when the murderer was not known, it was certainly impossible to secure it from guilt if the murderer was known and yet protected. All would be taught, by this solemnity, to use their utmost care and diligence to prevent, discover, and punish murder. Even the heathen mariners dreaded the guilt of blood, Jon 1:14. (3.) That we might all learn to take heed of partaking in other men's sins, and making ourselves accessory to them ex post facto - after the fact, by countenancing the sin or sinner, and not witnessing against it in our places. We have fellowship with the unfruitful works of darkness if we do not reprove them rather, and bear our testimony against them. The repentance of the church of Corinth for the sin of one of their members produced such a carefulness, such a clearing of themselves, such a holy indignation, fear, and revenge (Co2 7:11), as were signified by the solemnity here appointed.

By this law a soldier is allowed to marry his captive if he pleased. For the hardness of their hearts Moses gave them this permission, lest, if they had not had liberty given them to marry such, they should have taken liberty to defile themselves with them, and by such wickedness the camp would have been troubled. The man is supposed to have a wife already, and to take this wife for a secondary wife, as the Jews called them. This indulgence of men's inordinate desires, in which their hearts walked after their eyes, is by no means agreeable to the law of Christ, which therefore in this respect, among others, far exceeds in glory the law of Moses. The gospel permits not him that has one wife to take another, for from the beginning it was not so. The gospel forbids looking upon a woman, though a beautiful one, to lust after her, and commands the mortifying and denying of all irregular desires, though it be as uneasy as the cutting off of a right hand; so much does our holy religion, more than that of the Jews, advance the honour and support the dominion of the soul over the body, the spirit over the flesh, consonant to the glorious discovery it makes of life and immortality, and the better hope. But, though military men were allowed this liberty, yet care is here taken that they should not abuse it, that is, I. That they should not abuse themselves by doing it too hastily, though the captive was ever so desirable: "If thou wouldest have her to thy wife (Deu 21:10, Deu 21:11), it is true thou needest not ask her parents' consent, for she is thy captive, and is at thy disposal. But, 1. Thou shalt have no familiar intercourse till thou hast married her." This allowance was designed to gratify, not a filthy brutish lust, in the heat and fury of its rebellion against reason and virtue, but an honourable and generous affection to a comely and amiable person, though in distress; therefore he may make her his wife if he will, but he must not deal with her as with a harlot. 2. "Thou shalt not marry her of a sudden, but keep her a full month in thy house," Deu 21:12, Deu 21:13. This he must do either, (1.) That he may try to take his affection off from her; for he must know that, though in marrying her he does not do ill (so the law then stood), yet in letting her alone he does much better. Let her therefore shave her head, that he might not be enamoured with her locks, and let her nails grow (so the margin reads it), to spoil the beauty of her hand. Quisquid amas cupias non placuisse nimis - We should moderate our affection for those things which we are tempted to love inordinately. Or rather, (2.) This was done in token of her renouncing idolatry, and becoming a proselyte to the Jewish religion. The shaving of her head, the paring of her nails, and the changing of her apparel, signified her putting off her former conversation, which was corrupt in her ignorance, that she might become a new creature. She must remain in his house to be taught the good knowledge of the Lord and the worship of him: and the Jews say that if she refused, and continued obstinate in idolatry, he must not marry her. Note, The professors of religion must not be unequally yoked with unbelievers, Co2 6:14. II. That they should not abuse the poor captive. 1. She must have time to bewail her father and mother, from whom she was separated, and without whose consent and blessing she is now likely to be married, and perhaps to a common soldier of Israel, though in her country ever so nobly born and bred. To force a marriage till these sorrows were digested, and in some measure got over, and she was better reconciled to the land of her captivity by being better acquainted with it, would be very unkind. She must not bewail her idols, but be glad to part with them; to her near and dear relations only her affection must be thus indulged. 2. If, upon second thoughts, he that had brought her to his house with a purpose to marry her changed his mind and would not marry her, he might not make merchandise of her, as of his other prisoners, but must give her liberty to return, if she pleased, to her own country, because he had humbled her and afflicted her, by raising expectations and then disappointing them (Deu 21:14); having made a fool of her, he might not make a prey of her. This intimates how binding the laws of justice and honour are, particularly in the pretensions of love, the courting of affections, and the promises of marriage, which are to be looked upon as solemn things, that have something sacred in them, and therefore are not to be jested with.