And Moses said unto his father in law, Because the people come unto me to inquire of God:
Command the children of Israel, that they put out of the camp every leper, and every one that hath an issue, and whosoever is defiled by the dead:
He that toucheth the dead body of any man shall be unclean seven days.
He shall purify himself with it on the third day, and on the seventh day he shall be clean: but if he purify not himself the third day, then the seventh day he shall not be clean.