Numbers 19:14-19

14“This is the law when someone dies in a tent: everyone who comes into the tent and everyone who is in the tent shall be unclean seven days. 15And every open vessel that has no cover fastened on it is unclean. 16Whoever in the open field touches someone who was killed with a sword or who died naturally, or touches a human bone or a grave, shall be unclean seven days. 17For the unclean they shall take some ashes of the burnt sin offering, and fresh water shall be added in a vessel. 18Then a clean person shall take hyssop and dip it in the water and sprinkle it on the tent and on all the furnishings and on the persons who were there and on whoever touched the bone, or the slain or the dead or the grave. 19And the clean person shall sprinkle it on the unclean on the third day and on the seventh day. Thus on the seventh day he shall cleanse him, and he shall wash his clothes and bathe himself in water, and at evening he shall be clean.