Ezekiel 40:17-19

¹⁷Then brought he me into the outer court; and, behold, there were chambers and a pavement, made for the court round about: thirty chambers were on the pavement. ¹⁸The pavement was by the side of the gates, answerable to the length of the gates, even the lower pavement. ¹⁹Then he measured the breadth from the forefront of the lower gate to the forefront of the inner court outside, one hundred cubits, [both] on the east and on the north.