Numbers 19:17-18

17And they shall take for the unclean of the ashes of the purification-offering that hath been burned, and shall put running water thereon in a vessel;

18and a clean man shall take hyssop, and dip it in the water, and sprinkle it on the tent, and upon all the utensils, and upon the persons that were there, and upon him that hath touched the bone, or the one slain, or the dead person, or the grave;