Vayikra 21:5-6

Orthodox Jewish Bible

⁵ They shall not shave their head bald, neither shall they shave off the corner of their beard, nor make any cuttings in their basar.

⁶ They shall be kedoshim unto Eloheihem, and not commit Chillul ha-shem against the Shem of Eloheihem; for the offerings of Hashem made by eish and the lechem of Eloheihem they do offer; therefore they shall be kodesh.