Ezekiel 42:7

And [there was] light without, corresponding to the chambers of the outer court looking toward the front of the northern chambers; the length [of them was] fifty cubits.

And the wall that was without over against the chambers, toward the utter court on the forepart of the chambers, the length thereof was fifty cubits.

The wall that was outside by the side of the rooms, toward the outer court before the rooms, was fifty cubits long.