Leviticus 21:1-3

¹And Jehovah saith unto Moses, 'Speak unto the priests, sons of Aaron, and thou hast said unto them, For any person a priest is not defiled among his people,

²except for his relation who is near unto him — for his mother, and for his father, and for his son, and for his daughter, and for his brother.

³and for his sister, the virgin, who is near unto him, who hath not been to a man; for her he is defiled.