Ezekiel 42:4

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.

The way in front of them was like the appearance of the chambers which were on the north, according to their length so was their width, and all their exits were both according to their arrangements and openings.

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.