Ezekiel 44:17-27

17 When they enter the gateways to the inner courtyard, they must wear linen clothes. They must have no wool on them while they serve in the gateways to the inner courtyard and in the temple.
18 They must wear linen turbans on their heads and linen undergarments. They must not wear anything that makes them sweat.
19 When they go out among the people in the outer courtyard, they must take off the clothes that they wore as they served. They must leave their clothes in the side rooms of the holy place and put on other clothes so that they do not transfer the holiness from their clothes to the people.
20 "'They must not shave their heads or let their hair grow long. They must keep the hair on their heads trimmed.
21 None of the priests may drink wine when they enter the inner courtyard.
22 They must not marry widows or women who have been divorced. They may marry only virgins from the nation of Israel or widows of priests.
23 They must teach my people the difference between what is holy and what is unholy. They must show the people how to tell the difference between what is clean and what is unclean.
24 In all disputes the priests must act as judges and make decisions based on my laws. They must obey my rules and my regulations at all my festivals. They must observe holy days to worship me.
25 "'A priest must not make himself unclean by going near a dead body. But a priest may become unclean if the dead person is his father, mother, son, daughter, brother, or unmarried sister.
26 After a priest is made clean, he must wait seven days.
27 When he enters the inner courtyard of the holy place to serve in the holy place, he must bring his offering for sin, declares the Almighty LORD.