From the front of the gate at the entrance to the front of the inner vestibule of the gate was fifty cubits.
The measuring rod, six cubits of the sanctuary, a hand's breadth longer than common measure, tells us this holy house is built to a standard not of this world. The outer wall, thick and high on every side, separates the church from the world and speaks of God's protection: whoever attacks it will do so at their peril.
AI summary
Commenting on Ezekiel 40:5-26
And from the face of the gate of the entrance,.... That is, from the outward gate as you went into the porch, and was to the east, so called from people's passing and repassing (b) in it; so Jarchi takes it to be the eastern gate; the Targum calls it the middle gate: unto the face of the porch of the inner gate; which opened...
Fifty cubits - The length of the building. See MMMMM in the plan.