Ezekiel 44:20-22

“Nor shall they shave their heads, nor allow their locks to grow long. They shall only cut the hair of their heads. Nor shall any priest drink wine when they enter into the inner court. Nor shall they take for their wives a widow, nor one who has been divorced. But they shall take virgins of the seed of the house of Israel, or of a widow who is a widow of a priest.”

For some of these restrictions compare Leviticus 21:5; Leviticus 21:14. The shaving of the head was probably referring to practises in relation to idolatrous religion, the restriction on long hair differentiated them from the Nazirites (Numbers 1:1). But the aim may well have been so as to ensure that the hair was fully covered (Leviticus 10:6; Leviticus 21:10), so that when they went into the sanctuary no earthly defilement would drop from it. The restriction on wine was to ensure that none went to their sacred duties in a drunken or merry mood, unbefitting worship. The restriction on women was so that those dedicated to Yahweh and made holy might not share one, and be made one with one, who had previously been given to the mundane. The code for priests was now stricter than previously. All again stressed Yahweh's distinctiveness and holiness.