Leviticus 21:4-6 Tree of Life Version (TLV)
4 But he is not to defile himself—a husband among his people—and so profane himself.
5 “Kohanim are not to shave their heads, nor shave off the corners of their beards, nor make any cuttings in their flesh. 6 They are to be holy to their God, and not profane the Name of their God, for they present the offerings of Adonai made by fire, the bread of their God. Therefore they are to be holy.