19:8 The one who burns it 1 must wash his clothes in water and bathe himself in water. He will be ceremonially unclean until evening.
Bilangan 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.
1 sn Here the text makes clear that he had at least one assistant.