Numbers 19:17

For the unclean they shall take some ashes of the burnt sin offering , and fresh water shall be added in a vessel .

“For the unclean person, put some ashes from the burned purification offering into a jar and pour fresh water over them.

And for an unclean person they shall take of the ashes of the burnt heifer of purification for sin, and running water shall be put thereto in a vessel :