Ezekiel 42:5

He measured the length of the building along the front of the separate area behind it, with a gallery on each side, one hundred cubits, along with the inner nave and the porches of the court.

Opposite the twenty cubits which belonged to the inner court, and opposite the pavement which belonged to the outer court, was gallery corresponding to gallery in three stories.

Then a measuring rod like a staff was given to me, saying, “Get up and measure the sanctuary of God and the altar, and those who worship in it.