Ezekiel 40:46; Ezekiel 45:4

46 but the chamber which faces toward the north is for the priests who keep charge of the altar. These are the sons of Zadok, who from the sons of Levi come near to the LORD to minister to Him."

4 "It shall be the holy portion of the land; it shall be for the priests, the ministers of the sanctuary, who come near to minister to the LORD , and it shall be a place for their houses and a holy place for the sanctuary.