If he has been healed, then the priest is to command that two live and clean birds, some cedar wood, some crimson thread, and hyssop be brought for the one cleansed.

A clean person is to take some hyssop, dip it in water, and then sprinkle it on the tent, on every vessel, and on whoever was there (that is, on whoever touched the bones, the killed person, or the dead body, including whoever dug the grave).

For after every commandment in the Law had been spoken to all the people by Moses, he took the blood of calves and goats, together with some water, scarlet wool, and branches of hyssop, and sprinkled the scroll and all the people,

And

For if the blood of goats and bulls and the ashes of a heifer sprinkled on those who are unclean purifies them physically,

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

and from Jesus the Messiah, the witness, the faithful one, the firstborn from the dead, and the ruler over the kings of the earth. To the one who loves us and has freed us from our sins by his blood

Whiter

"Please come, and let's reason together," implores the LORD. "Even though your sins are like scarlet, they'll be white like snow. Though they're like crimson, they'll become like wool.

so that he might make it holy by cleansing it, washing it with water and the word,

"Who are these people wearing white robes," one of the elders asked me, "and where did they come from?"

General references

Any person who touches his bed is to wash his garments and bathe with water, and he will remain unclean until evening.

because on that day, atonement will be made for you to cleanse you from all your sins. You are to be clean in the LORD's presence.

Then the priest is to take some cedar wood, hyssop, and scarlet material and throw it into the middle of the burning heifer.