Leviticus 21:2-3

2except for his closest relatives, his mother, his father, his son, his daughter, his brother, 3or his virgin sister (who is near to him because she has had no husband; for her he may make himself unclean).

Leviticus 21:10

10 a  “The priest who is chief among his brothers, on whose head the anointing oil is poured and who has been consecrated to wear the garments b  shall not let the hair of his head hang loose nor tear his clothes.
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