Ezekiel 42:7-9

Young's Literal Translation

⁷ As to the wall that [is] at the outside, over-against the chambers, the way of the outer-court at the front of the chambers, its length [is] fifty cubits;

⁸ for the length of the chambers that [are] to the outer court [is] fifty cubits, and of those on the front of the temple a hundred cubits.

⁹ And under these chambers [is] the entrance from the east, in one's going into them from the outer court.