Ezekiel 41:4-6

Young's Literal Translation

⁴ And he measureth its length twenty cubits, and the breadth twenty cubits, unto the front of the temple, and he saith unto me, `This [is] the holy of holies.'

⁵ And he measureth the wall of the house six cubits, and the breadth of the side-chamber four cubits, all round the house round about.

⁶ And the side-chambers [are] side-chamber by side-chamber, three and thirty times; and they are entering into the wall -- which the house hath for the side-chambers all round about -- to be taken hold of, and they are not taken hold of by the wall of the house.