'Vestibule' in the Bible

Each guardhouse measured one reed long and one reed wide, and the distance between each guardhouse was five cubits. The threshold of the gate near the vestibule facing away from the Temple entrance measured one reed.

Next, he measured the vestibule of the gate facing away from the Temple entrance at one reed.

He measured the vestibule of the gate inside at eight cubits and the doorjambs at two cubits. (The vestibule at the gate faced away from the Temple.)

The distance from the front entrance gate to the vestibule of the inner gate measured 50 cubits.