Ezekiel 42:1, 3, 7-9, 14

Then he led me out into the outer court, toward the north, and he brought me to the chambers that were opposite the separate yard and opposite the building on the north.

Facing the twenty cubits that belonged to the inner court, and facing the pavement that belonged to the outer court, was gallery against gallery in three stories.

And there was a wall outside parallel to the chambers, toward the outer court, opposite the chambers, fifty cubits long. For the chambers on the outer court were fifty cubits long, while those opposite the nave were a hundred cubits long. Below these chambers was an entrance on the east side, as one enters them from the outer court.

When the priests enter the Holy Place, they shall not go out of it into the outer court without laying there the garments in which they minister, for these are holy. They shall put on other garments before they go near to that which is for the people.”