15-16. “But the Levitical priests who descend from Zadok, who faithfully took care of my Sanctuary when everyone else went off and left me, are going to come into my presence and serve me. They are going to carry out the priestly work of offering the solemn sacrifices of worship. Decree of God, the Master. They’re the only ones permitted to enter my Sanctuary. They’re the only ones to approach my table and serve me, accompanying me in my work.
17-19. “When they enter the gate complex of the inside courtyard, they are to dress in linen. No woolens are to be worn while serving at the gate complex of the inside courtyard or inside the Temple itself. They’re to wear linen turbans on their heads and linen underclothes—nothing that makes them sweat. When they go out into the outside courtyard where the people gather, they must first change out of the clothes they have been serving in, leaving them in the sacred rooms where they change to their everyday clothes, so that they don’t trivialize their holy work by the way they dress.
20. “They are to neither shave their heads nor let their hair become unkempt, but must keep their hair trimmed and neat.
21. “No priest is to drink on the job—no wine while in the inside courtyard.