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.

3-6. ye shall give her unto Eleazar the priest that he may bring her forth without the camp—He was the second or deputy high priest, and he was selected for this duty because the execution of it entailed temporary defilement, from which the acting high priest was to be preserved with the greatest care. It was led "forth without the camp," in accordance with the law regarding victims laden with the sins of the people, and thus typical of Christ (Heb 13:12; also Le 24:14). The priest was to sprinkle the blood "seven times" before—literally, "towards" or "near" the tabernacle, a description which seems to imply either that he carried a portion of the blood in a basin to the door of the tabernacle (Le 4:17), or that in the act of sprinkling he turned his face towards the sacred edifice, being disqualified through the defiling influence of this operation from approaching close to it. By this attitude he indicated that he was presenting an expiatory sacrifice, for the acceptance of which he hoped, in the grace of God, by looking to the mercy seat. Every part of it was consumed by fire except the blood used in sprinkling, and the ingredients mixed with the ashes were the same as those employed in the sprinkling of lepers (Le 14:4-7). It was a water of separation—that is, of "sanctification" for the people of Israel.