The priest shall also take cedar wood, and hyssop, and scarlet twice dyed, and cast it into the flame, with which the cow is consumed.

and the priest hath taken cedar wood, and hyssop, and scarlet, and hath cast unto the midst of the burning of the cow;

And the priest shall take cedar wood, and hyssop, and scarlet, and cast it into the middle of the burning of the heifer.

Then let the priest take cedar-wood and hyssop and red thread, and put them into the fire where the cow is burning.

Likewise, cedar wood, and hyssop, and twice-dyed scarlet he shall cast into the flame, by which the cow is consumed.

Tunc accipiet sacerdos lignum cedrinum, et hyssopum, et coccum vermiculi, projicietque in medium combustionis vaccae.

And the priest shall take cedar-wood. That the sprinkling of the blood might be conjoined with that of the water, the cedar-wood, and hyssop, and scarlet, thread, with which the sprinkling was wont to be made, were cast into the fire; for, unless the Israelites had been admonished by this visible sign, they would not have so clearly known that they were not only washed with the water, but that by the offering of the sacrifice also their uncleanness was removed. But it was not enough that the blood should be poured forth, unless, as has been already seen, they were purified by its aspersion. But, for as much as the scent of cedar-wood is precious, and in hyssop there is a cleansing property, we gather from hence also that the victim was pure, although it bore their sins together with the curse and expiation. Peter teaches us how we are sprinkled with the blood of Christ, viz., through the Spirit, (1-Peter 1:2;) nay, John shews us in his Canonical Epistle, that we find all the parts of this ceremony in Christ, where he writes that Christ "came by water and blood," and "it is the Spirit that beareth witness, because the Spirit is truth." (1 John 5:6.)

Compare Leviticus 14:4 note.

And the priest shall take cedar wood, and hyssop, and scarlet,.... Another priest, according to the Targum of Jonathan; but it seems to design Eleazar the priest, and so, in later times, the same priest that burnt the cow took these things; the Jews say (h), when he took them he said, is this cedar wood? is this hyssop? is this scarlet? so he said three times for everyone of them, and he was answered, yes, three times to each of them: these were the same that were used at the cleansing of the leper, Leviticus 14:4,
and cast it into the midst of the burning of the heifer; these were rolled or bound up together, as the Jews say (i), and made one bundle of, that they might the more easily be cast into the fire; the hyssop was wrapped about the cedar wood with the scarlet wool: the true reason of the use of these, Maimonides says (k), was never clear to him; but the cedar wood, being durable, may denote the continued efficacy of Christ's sufferings; the hyssop, being purgative and of a good smell, the purging nature of Christ's sacrifice, who by himself purged away our sins, and the sweet odour thereof ascended to the Lord; and the scarlet, the sins of his people destroyed thereby.
(h) Misn. Parah, c. 3. sect. 10. (i) Misn. Parah, c. 3. sect. 11. & Maimon. & Bartenora in ib. (k) Moreh Nevochim, par. 3. c. 47.

Cedar - wood, hyssop, scarlet - All which are here burnt, and as it were offered to God, that they might be sanctified to this holy use for the future; for of these kinds of things was the sprinkle made wherewith the unclean were sprinkled, Leviticus 14:4.