Bible Verses About Priests: While unclean could not perform any service

ADONAI said to Moshe,

"Tell Aharon and his sons to separate themselves from the holy things of the people of Isra'el which they set apart as holy for me, so that they will not profane my holy name; I am ADONAI.

The cohen is to take cedar-wood, hyssop and scarlet yarn and throw them onto the heifer as it is burning up.

Then the cohen is to wash his clothes and himself in water, after which he may re-enter the camp; but the cohen will remain unclean until evening.