Numbers 19:17-18

“For the unclean person, put some ashes from the burned purification offering into a jar and pour fresh water over them. Then a man who is ceremonially clean is to take some hyssop, dip it in the water and sprinkle the tent and all the furnishings and the people who were there. He must also sprinkle anyone who has touched a human bone or a grave or anyone who has been killed or anyone who has died a natural death.