Ezekiel 42:13

A chamber with its doorway was by the side pillars at the gates; there they rinse the burnt offering.

but the chamber which faces toward the north is for the priests who keep the responsibility of the altar. These are the sons of Zadok, who from the sons of Levi come near to Yahweh to minister to Him.”

The building that was in front of the separate area at the side toward the west was seventy cubits wide; and the wall of the building was five cubits thick all around, and its length was ninety cubits.

Then he measured the house, one hundred cubits long; the separate area with the building and its walls were also one hundred cubits long.

He measured the length of the building along the front of the separate area behind it, with a gallery on each side, one hundred cubits, along with the inner nave and the porches of the court.

Then he brought me out into the outer court, the way toward the north; and he brought me to the chamber which was opposite the separate area and opposite the building toward the north.

In the thickness of the wall of the court toward the east, facing the separate area and facing the building, there were chambers.

Then a measuring rod like a staff was given to me, saying, “Get up and measure the sanctuary of God and the altar, and those who worship in it.