Numbers 19:4-8

And Eleazar the priest shall take some of its blood with his finger and sprinkle some of its blood toward the front of the tent of meeting seven times.

Then the heifer shall be burned in his sight; its hide, its flesh, and its blood, with its refuse, shall be burned.

And the priest shall take cedar wood, hyssop, and scarlet material, and throw it into the midst of the burning heifer.

The priest shall then wash his clothes and bathe his body in water, and afterward come into the camp; but the priest will be unclean until evening.

The one who burns the heifer shall also wash his clothes in water and bathe his body in water, and will be unclean until evening.