Ezekiel 44:20-23 New American Standard Bible (NASB)

20. Also they shall not shave their heads, yet they shall not let their locks grow long; they shall only trim the hair of their heads.

21. Nor shall any of the priests drink wine when they enter the inner court.

22. And they shall not marry a widow or a divorced woman but shall take virgins from the offspring of the house of Israel, or a widow who is the widow of a priest.

23. Moreover, they shall teach My people the difference between the holy and the profane, and cause them to discern between the unclean and the clean.

Ezekiel 44