Ezekiel 42:1-3

Then he brought me out into the outer courtyard, the way toward the north; and he brought me to the chamber which was opposite the separate area and opposite the building toward the north.

Along the length, which was a hundred cubits, was the north door; the width was fifty cubits.

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