Ezekiel 41:9 in the World English Bible
The thickness of the outer wall of the side rooms was five cubits. That which was left was the place of the side rooms that belonged to the house.
Context
8 I saw also the height of the house round about: the foundations of the side chambers were a full reed of six great cubits.
9 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.
10 And between the chambers was the wideness of twenty cubits round about the house on every side.