Leviticus 21:3-6

³and for a virgin sister that is near to one, that is not espoused to a man; for these one shall defile himself.

⁴He shall not defile himself suddenly among his people to profane himself.

⁵And ye shall not shave your head for the dead with a baldness on the top; and they shall not shave their beard, neither shall they make gashes on their flesh.

⁶They shall be holy to their God, and they shall not profane the name of their God; for they offer the sacrifices of the Lord as the gifts of their God, and they shall be holy.