Numbers 19:6 (BSB)

The priest is to take cedar wood, hyssop, and scarlet wool and throw them onto the burning heifer.

From Numbers 19. Also in the ESV.

Commentary on Numbers 19:6

• John Calvin (Reformed), Calvin's Commentaries on Numbers 19:6: 6 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...
• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Numbers 19:1-10: We have here the divine appointment concerning the solemn burning of a red heifer to ashes, and the preserving of the ashes, that of them might be made, not a beautifying, but a purifying, water, for that was the utmost the law reached to; it offered not to adorn as the gospel does, but to cleanse only.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Numbers 19:6: 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?
• Keil & Delitzsch (Lutheran), Biblical Commentary on the Old Testament on Numbers 19:2-10: Num 19:2-10 Preparation of the Purifying Water. - As water is the ordinary means by which all kinds of uncleanness are removed, it was also to be employed in the removal of the uncleanness of death. But as this uncleanness was the strongest of all religious defilements, fresh water alone was not sufficient to remove it; and consequently a certain kind of sprinkling-water was appointed...