Ezekiel 41:7

And there was an enlarging, and a winding about still upward to the side chambers: for the winding about of the house went still upward round about the house: therefore the breadth of the house was still upward, and so increased from the lowest chamber to the highest by the midst.

Cross-reference

Ezekiel 41:5 gives the base width of the side chambers, setting the stage for the widening described here.

Ezekiel 42:5 notes upper chambers are shorter due to galleries — contrasting the widening side chambers here.