Ezekiel 41:6-7

6The rooms were arranged on three different stories. There were 30 rooms on each story. These rooms had supports all the way around the temple wall, but these supports were not fastened to the temple wall.

7The side rooms grew wider all the way around as they went up, story after story. The surrounding structure went from story to story all around the temple. The structure grew wider as it went higher. A stairway went from the first story through the second story to the third story.