Ezekiel 40:34-38

And the arches thereof were toward the outward court; and palm trees were upon the posts thereof, on this side, and on that side: and the going up to it had eight steps.

And he brought me to the north gate, and measured it according to these measures;

The little chambers thereof, the posts thereof, and the arches thereof, and the windows to it round about: the length was fifty cubits, and the breadth five and twenty cubits.

And the posts thereof were toward the utter court; and palm trees were upon the posts thereof, on this side, and on that side: and the going up to it had eight steps.

And the chambers and the entries thereof were by the posts of the gates, where they washed the burnt offering.