Ezekiel 40:20-23

As for the gate of the outer court which faced the north, he measured its length and its width. It had three guardrooms on each side; and its side pillars and its porches had the same measurement as the first gate. Its length was fifty cubits and the width twenty-five cubits. Its windows and its porches and its palm tree ornaments had the same measurements as the gate which faced toward the east; and it was reached by seven steps, and its porch was in front of them. The inner court had a gate opposite the gate on the north as well as the gate on the east; and he measured a hundred cubits from gate to gate.