Ezekiel 40:21-22

21And its chambers were three on this side and three on that side; and its posts and its projections were according to the measure of the first gate: its length was fifty cubits, and breadth five and twenty cubits.

22And its windows, and its projections, and its palm-trees were according to the measure of the gate that looked toward the east; and they went up to it by seven steps; and the projections thereof were before them.