Ezekiel 44:10-20

10 But the Levites who went far from me, going astray from me after their idols when Israel went astray, shall bear their punishment.
11 They shall be ministers in my sanctuary, having oversight at the gates of the temple, and serving in the temple; they shall slaughter the burnt offering and the sacrifice for the people, and they shall attend on them and serve them.
12 Because they ministered to them before their idols and made the house of Israel stumble into iniquity, therefore I have sworn concerning them, says the Lord God, that they shall bear their punishment.
13 They shall not come near to me, to serve me as priest, nor come near any of my sacred offerings, the things that are most sacred; but they shall bear their shame, and the consequences of the abominations that they have committed.
14 Yet I will appoint them to keep charge of the temple, to do all its chores, all that is to be done in it.
15 But the levitical priests, the descendants of Zadok, who kept the charge of my sanctuary when the people of Israel went astray from me, shall come near to me to minister to me; and they shall attend me to offer me the fat and the blood, says the Lord God.
16 It is they who shall enter my sanctuary, it is they who shall approach my table, to minister to me, and they shall keep my charge.
17 When they enter the gates of the inner court, they shall wear linen vestments; they shall have nothing of wool on them, while they minister at the gates of the inner court, and within.
18 They shall have linen turbans on their heads, and linen undergarments on their loins; they shall not bind themselves with anything that causes sweat.
19 When they go out into the outer court to the people, they shall remove the vestments in which they have been ministering, and lay them in the holy chambers; and they shall put on other garments, so that they may not communicate holiness to the people with their vestments.
20 They shall not shave their heads or let their locks grow long; they shall only trim the hair of their heads.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.