Numbers 19:10

19:10 The one who gathers the ashes of the heifer must wash his clothes and be ceremonially unclean until evening. This will be a permanent ordinance both for the Israelites and the resident foreigner who lives among them.

Numbers 19:22

19:22 And whatever the unclean person touches will be unclean, and the person who touches it will be unclean until evening.’”