Numbers 19:21-22

Young's Literal Translation

²¹ `And it hath been to them for a statute age-during, that he who is sprinkling the water of separation doth wash his garments, and he who is coming against the water of separation is unclean till the evening,

²² and all against which the unclean person cometh is unclean, and the person who is coming against [it] is unclean till the evening.'