Numbers 19:20-21

20And the man that is unclean, and doth not purify himself, that soul shall be cut off from the midst of the congregation, for he hath defiled the sanctuary of Jehovah: the water of separation hath not been sprinkled on him: he is unclean.

21And it shall be an everlasting statute unto them. And he that sprinkleth the water of separation shall wash his garments, and he that toucheth the water of separation shall be unclean until even.