Ezekiel 40:15

Measurement of the whole length of the gate-building, 50 cubits.

the face of the gate i.e. the outside front.

face of the porch of the inner gate i.e the front of the porch at the inner end of the gate. Either "inner gate" means inner part of the gate, or "inner" means (lying) towards the inside, as LXX. From the outside front of the gate to the inner front, lying on the court, was 50 cubits. The sense is clear though the text may need slight emendation.