Jezekiel 41:9

9 and the breadth of the wall of each side without was five cubits; and the spaces that were left between the sides of the house,

Jezekiel 41:9 In-Context

7 And the breadth of the upper side according to the projection out of the wall, against the upper one round about the house, that it might be enlarged above, and that might go up to the upper chambers from those below, and from the ground-sills to the third story.
8 And as for the height of the house round about, space between the sides was equal to a reed of six cubits;
9 and the breadth of the wall of each side without was five cubits; and the spaces that were left between the sides of the house,
10 and between the chambers, were a width of twenty cubits, the circumference of the house.
11 And the doors of the chambers were toward the space left by the one door that looked northward, and one door southward; and the breadth of the remaining open space five cubits in extent round about.

The Brenton translation of the Septuagint is in the public domain.