Jezekiel 41:10

10 and between the chambers, were a width of twenty cubits, the circumference of the house.

Jezekiel 41:10 In-Context

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.
12 And the partition in front of the remaining space, toward the west, was seventy cubits in breadth; the breadth of the partition wall was five cubits round about, and the length of it ninety cubits.

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