And a clean person shall take hyssop, and dip it in the water, and sprinkle it upon the tent, and upon all the vessels, and upon the persons that were there, and upon him that touched a bone, or one slain, or one dead, or a grave:

For 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,

And

For if the blood of bulls and of goats, and the ashes of a heifer sprinkling the unclean, sanctifies to the purifying of the flesh:

But if we walk in the light, as he is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleanses us from all sin.

And from Jesus Christ, who is the faithful witness, and the first begotten of the dead, and the prince of the kings of the earth. Unto him that loves us, and washed us from our sins in his own blood,

Whiter

Come now, and let us reason together, says the LORD: though your sins be as scarlet, they shall be as white as snow; though they be red like crimson, they shall be as wool.

That he might sanctify and cleanse it with the washing of water by the word,

And one of the elders answered, saying unto me, Who are these who are arrayed in white robes? and from where did they come?

General references

And whosoever touches his bed shall wash his clothes, and bathe himself in water, and be unclean until the evening.

For on that day shall the priest make an atonement for you, to cleanse you, that you may be clean from all your sins before the LORD.

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