Leviticus 21:3-5

Living Bible

^2-3 unless it is a near relative—a mother, father, son, daughter, brother, or unmarried^[a] sister for whom he has special responsibility since she has no husband. ⁴ For the priest is a leader among his people, and he may not ceremonially defile himself as an ordinary person can.

⁵ “The priests shall not clip bald spots in their hair or beards, nor cut their flesh.