Numbers 19:7-10

7“Then the priest must wash his clothes and bathe himself in water. Afterward he may return to the camp, though he will remain ceremonially unclean until evening.

8The man who burns the animal must also wash his clothes and bathe himself in water, and he, too, will remain unclean until evening.

9Then someone who is ceremonially clean will gather up the ashes of the heifer and deposit them in a purified place outside the camp. They will be kept there for the community of Israel to use in the water for the purification ceremony. This ceremony is performed for the removal of sin.

10The man who gathers up the ashes of the heifer must also wash his clothes, and he will remain ceremonially unclean until evening. This is a permanent law for the people of Israel and any foreigners who live among them.