I have said that the Scriptural mode of purifying for proselytes was by sprinkling with the water of _nidda_. Of its use there is a conspicuous example. On account of their licentious wiles against Israel, Midian was doomed to destruction. In the campaign which followed, none were spared, except the female children. These were reserved for bond servants. (Num. xxxi, 18; and compare Lev. xxv, 44-46; and Deut. xxi, 10-14.) But, from the days of Abraham, all bond servants had been by divine authority and command endowed with an equal right and share with their masters in God’s favor and covenant. And as Israel itself had been purified from the defilements and idolatries of Egypt, and ordained as the peculiar people of God by the baptism of blood and water at Sinai, so these children of licentious Midian, spared from the destruction incurred by their parents, and about to be joined with Israel as God’s people, must be cleansed and admitted in the same manner. During the expedition, many of the army had become defiled by contact with the slain, and were therefore to be cleansed with the water of separation, according to the law. Moses, therefore, issued orders to the men of the army: “Do ye abide without the camp seven days; whosoever hath killed any person, and whosoever hath touched any slain, _purify_ both yourselves and your _captives_ on the third day, and on the seventh day.” In these directions as to the third and seventh days, we recognize the exact requirements of the law, with respect to the water of separation for the purification of sin. But the narrative is still more specific. “Eleazer the priest said unto the men of war which went to the battle, This is the ordinance of the law which the Lord commanded Moses. Only the gold and the silver, the brass, the iron, the tin, and the lead, every thing that may abide the fire, ye shall make it go through the fire, and it shall be clean. Nevertheless, it shall be purified with _the water of separation_, and all that abideth not the fire ye shall make go through the water. And ye shall wash your clothes on the seventh day, and ye shall be clean, and afterward ye shall come into the camp.”—Num. xxxi, 19-24. “The water of separation,” here, is, in the original, “the water of _nidda_,”—the water, that is, in which were mingled the ashes of the red heifer. With this, therefore, it was that these daughters of Midian were baptized and cleansed. There were thirty-two thousand of these captives, thus rescued from the destruction incurred by the licentiousness and crimes of their own people, purged from their uncleanness, engrafted into the family of Abraham, and endowed with the blessings of the covenant. All were “women children” (Num. xxxi, 18); and, undoubtedly, many were mere babes; the first recorded example of distinctive infant baptism. SECTION XVIII.—_The Baptism of Infants._