Ezekiel 41:13

Overview - Ezekiel 41
The measures, parts, chambers, and ornaments of the temple.
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Ezekiel 41:13  (King James Version)
So he measured the house, an hundred cubits long; and the separate place, and the building, with the walls thereof, an hundred cubits long;

he measured
These verses (13-15) seem to intimate, that all the buildings of the temple occupied an area of 100 square cubits.