“ ‘If one of Aaron’s descendants has a harmful skin disease, or if he discharges a body fluid, he cannot eat the holy offerings until he becomes clean. He could also become unclean from touching a dead body, from his own semen,
“ ‘If they are next to someone who dies suddenly, their hair, which was part of their promise, has been made unclean. So they must shave their head seven days later to be clean.