The purification of the leper must have been of rare occurrence. All the facts and indications of the Scriptures tend to the conclusion that, except by miraculous agency, the disease was incurable. The baptism of Israel at Sinai was extraordinary in its nature and circumstances, and could not have been repeated except in circumstances equally remarkable, such as that when, in the plains of Moab, the covenant was renewed with the new generation, which had risen up to take the place of those who perished in the wilderness. (Deut. xxix, 1.) But of that transaction the particulars are not recorded. In the water of separation, provision was made for an ordinary rite, essentially the same, in its nature, mode, and meaning, as the Sinai baptism; and so ordered as to serve as a continual memorial and repetition of it, and reiteration of the promises and instructions therein embodied. This rite was appointed for the cleansing of defilements of daily occurrence, and was maintained through all the after history of Israel, until the time of Christ, and the destruction of Jerusalem. It was known to the Jews by the name of _baptism_. In preparation for this rite, a red heifer without blemish was chosen by the priest, and slain without the camp, whence the priest sprinkled the blood toward the door of the tabernacle of the congregation seven times. The entire heifer was then burned, while the priest cast cedar wood, hyssop, and scarlet into the burning. The ashes were gathered and laid up in a clean place, without the camp. (Num. xix, 2-10.) They were to be “kept for the congregation of the children of Israel for a water of separation.”—Ib. 9. By the phrase, “water of separation,” is not meant a water to cause separation, but a remedy for it. They were, as Zechariah expresses it, “_for_ sin and _for_ uncleanness.”—Zech. xiii, 1.