Ezekiel 42:5-6

5The rooms at the top level were not as wide as the rooms below them. And the rooms at the middle level were not as wide as the rooms at the lowest level. This was because the higher rooms needed more space in front of them.

6They did not have pillars to hold them up as other rooms in the temple yards did. Instead, the walls of the lower rooms held up the rooms above them. So the rooms of each level were smaller than the rooms below them.