Números 19
14This is the law, when a man dieth in a tent: all that come into the tent, and all that is in the tent, shall be unclean seven days.
19And the clean person shall sprinkle upon the unclean on the third day, and on the seventh day: and on the seventh day he shall purify himself, and wash his clothes, and bathe himself in water, and shall be clean at even.