John Gill Commentary Ezekiel 40:46

"and the chamber whose prospect is toward the north is for the priests, the keepers of the charge of the altar: these are the sons of Zadok, who from among the sons of Levi come near to Jehovah to minister unto him." — Ezekiel 40:46 (ASV)

And the chamber whose prospect is towards the north The row of chambers on the side of the east gate; that side of it that was towards the north, and which the chambers in it faced:

is for the priests, the keepers of the charge of the altar ; the ministers of the Gospel, that take care of the altar, of public worship; that preach the Gospel, and administer ordinances; and who are to be taken care of themselves, and live of the Gospel, and have everything provided for them that is necessary, (1 Corinthians 9:13 1 Corinthians 9:14):

these are the sons of Zadok, among the sons of Levi ; these Levites, or priests, were of the family of Zadok; who descended from Aaron, and was the eldest house of Aaron, to whom the priesthood belonged; though it had been usurped a long time by the family of Ithamar; but, in Solomon's time, Abiathar, of that family, was dispossessed of it, and Zadok was placed in his stead, whose name signifies "just", or righteous; and was a type of Christ, the holy and just One, whose spiritual children and offspring are here meant:

which come near to the Lord to minister unto him ; both preachers and people, who have near access to God through Christ, and minister before him in holy things, in praying, preaching, administering ordinances, and attending on the same.