Ezekiel 40:17-19

Young's Literal Translation

¹⁷ And he bringeth me in unto the outer court, and lo, chambers and a pavement made for the court all round about -- thirty chambers on the pavement --

¹⁸ and the pavement unto the side of the gates over-against the length of the gates [is] the lower pavement;

¹⁹ and he measureth the breadth from before the lower gate, to the front of the inner court, on the outside, a hundred cubits, eastward and northward.