Numbers 19:7-9

Darby Translation

⁷ And the priest shall wash his garments, and he shall bathe his flesh in water, and afterwards he shall come into the camp; and the priest shall be unclean until the even;

⁸ and he that hath burned it shall wash his garments in water, and bathe his flesh in water, and shall be unclean until the even.

⁹ And a clean man shall gather the ashes of the heifer, and deposit them outside the camp in a clean place, and it shall be kept for the assembly of the children of Israel for a water of separation: it is a purification for sin.