Ezekiel 41:9, 12-15

The thickness of the wall, which was for the side chamber without, was five cubits: and that which was left was the place of the side chambers that were within.

Now the building that was before the separate place at the end toward the west was seventy cubits broad; and the wall of the building was five cubits thick round about, and the length thereof ninety cubits. So he measured the house, an hundred cubits long; and the separate place, and the building, with the walls thereof, an hundred cubits long; also the breadth of the face of the house, and of the separate place toward the east, an hundred cubits. And he measured the length of the building over against the separate place which was behind it, and the galleries thereof on the one side and on the other side, an hundred cubits, with the inner temple, and the porches of the court