Now therefore kill every male among the little ones,.... Which they had taken and brought captives, Num 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.

And Moses was wroth with the officers of the host--The displeasure of the great leader, though it appears the ebullition of a fierce and sanguinary temper, arose in reality from a pious and enlightened regard to the best interests of Israel. No order had been given for the slaughter of the women, and in ancient war they were commonly reserved for slaves. By their antecedent conduct, however, the Midianitish women had forfeited all claims to mild or merciful treatment; and the sacred character, the avowed object of the war (Num 31:2-3), made their slaughter necessary without any special order. But why "kill every male among the little ones"? It was designed to be a war of extermination, such as God Himself had ordered against the people of Canaan, whom the Midianites equalled in the enormity of their wickedness.