Leviticus 21:4-6

Darby Translation

⁴ He shall not make himself unclean [who is] a chief among his peoples, to profane himself.

⁵ They shall not make any baldness upon their head, neither shall they shave off the corners of their beard, nor make any cuttings in their flesh.

⁶ They shall be holy unto their God, and not profane the name of their God; for they present Jehovah's offerings by fire, the bread of their God; therefore shall they be holy.