The thickness of the outer wall of the side chambers was five cubits. The free space between the side chambers of the temple
We are still attending a prophet that is under the guidance of an angel, and therefore attend with reverence, though we are often at a loss to know both what this is and what it is to us. Observe here, 1. After the prophet had observed the courts he was at length brought to the temple, Eze 41:1.
Commenting on Ezekiel 41:1-11
The thickness of the wall, which was for the side chambers without, was five cubits,.... This is the outward wall of the chambers, north and south, which was five cubits thick, made of stone; See Gill on Eze 41:5, and that which was left was the place of the side chambers that were within; this was a void space, not built upon, which was before...
that which was left--There was an unoccupied place within chambers that belonged to the house. The buildings in this unoccupied place, west of the temple, and so much resembling it in size, imply that no place was to be left which was to be held, as of old, not sacred. Manasseh (Kg2 23:11) had abused these "suburbs of the temple" to keeping horses sacred to the sun.