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, bshall not let the hair of his head hang loose nor tear his clothes.
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