Ezekiel 41:3, 4

Then he went into the inner sanctuary and measured the jambs of the entrance; each was two cubits wide. The entrance was six cubits wide, and the projecting walls on each side of it were seven cubits wide.

And he measured the length of the inner sanctuary; it was twenty cubits, and its width was twenty cubits across the end of the main hall. He said to me, “This is the Most Holy Place.”