Num 19.6And the priest shall take cedar wood, and hyssop, and scarlet, and cast it into the midst of the burning of the heifer.
Evr 9.19For when Moses had spoken every precept to all the people according to the law, he took the blood of calves and of goats, with water, and scarlet wool, and hyssop, and sprinkled both the book, and all the people,