19:9 And a man [that is] clean shall gather up the ashes of the heifer, and lay [them] up without the camp in a clean place, and it shall be kept for the congregation of the children of Israel for a {e} water of separation: it [is] a purification for sin.
(e) Or, the water of separation because they that were separate due to their uncleanness, were sprinkled with it and made clean, Nu 8:7. It is also called holy water, because it was ordained for a holy use, Nu 1:17.
19:9 For a water - Or, to the water, that is, to be put to the water, or mixed with it. Of separation - Appointed for the cleansing of them that are in a state of separation, who for their uncleanness are separated from the congregation. It is a purification for sin - Heb. a sin, that is, an offering for sin, or rather a mean for expiation or cleansing of sin. And this was a type of that purification for sin, which our Lord Jesus made by his death.
19:1-10 The heifer was to be wholly burned. This typified the painful sufferings of our Lord Jesus, both in soul and body, as a sacrifice made by fire, to satisfy God's justice for man's sin. These ashes are said to be laid up as a purification for sin, because, though they were only to purify from ceremonial uncleanness, yet they were a type of that purification for sin which our Lord Jesus made by his death. The blood of Christ is laid up for us in the word and sacraments, as a fountain of merit, to which by faith we may have constant recourse, for cleansing our consciences.