31:13-18 The sword of war should spare women and children; but the sword of justice should know no distinction, but that of guilty or not guilty. This war was the execution of a righteous sentence upon a guilty nation, in which the women were the worst criminals. The female children were spared, who, being brought up among the Israelites, would not tempt them to idolatry. The whole history shows the hatefulness of sin, and the guilt of tempting others; it teaches us to avoid all occasions of evil, and to give no quarter to inward lusts. The women and children were not kept for sinful purposes, but for slaves, a custom every where practised in former times, as to captives. In the course of providence, when famine and plagues visit a nation for sin, children suffer in the common calamity. In this case parents are punished in their children; and for children dying before actual sin, full provision is made as to their eternal happiness, by the mercy of God in Christ.Now therefore kill every male among the little ones,.... Which they had taken and brought captives, Numbers 31:9.

and kill every woman that hath known man by lying with him; who might be such, at least many of them, who had lain with Israelitish men; and as the adulterers had been put to death, so now the adulteresses; or they were ordered to, be slain, even all of them, lest they should entice the children of Israel to uncleanness, and so to idolatry again: now these were known to be such, either by conjecture at their age, or rather, through the examination of matrons, unless it can be thought, as it is by some, that it was by divine revelation.