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

For when every commandment had been spoken by Moses to all the people according to the law, he took the blood of the calves and the goats, with water and scarlet wool and hyssop, and sprinkled both the book itself and all the people,

And

For if the blood of goats and bulls, and the ashes of a heifer sprinkling those who have been defiled, sanctify to the cleanness of the flesh:

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

and from Jesus Christ, the faithful witness, the firstborn of the dead, and the ruler of the kings of the earth. To him who loves us, and washed us from our sins by his blood;

Whiter

"Come now, and let us reason together," says Yahweh: "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 it, having cleansed it by the washing of water with the word,

One of the elders answered, saying to me, "These who are arrayed in white robes, who are they, and from where did they come?"

General references

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

for on this day shall atonement be made for you, to cleanse you; from all your sins you shall be clean before Yahweh.

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