Numbers 19:8-12

⁸And he that burns her shall wash his garments, and bathe his body, and shall be unclean till evening.

⁹And a clean man shall gather up the ashes of the heifer, and lay them up in a clean place outside the camp; and they shall be for the congregation of the children of Israel to keep: it is the water of sprinkling, a purification.

¹⁰And he that gathers up the ashes of the heifer shall wash his garments, and shall be unclean until evening; and it shall be a perpetual statute for the children of Israel and for the strangers joined to them.

¹¹He that touches the dead body of any man, shall be unclean seven days.

¹²He shall be purified on the third day and the seventh day, and shall be clean; but if he be not purged on the third day and the seventh day, he shall not be clean.