Ezekiel 40:35-38

Then he took me around to the north gateway leading to the inner courtyard. He measured it, and it had the same measurements as the other gateways. The guard alcoves, dividing walls, and entry room of this gateway had the same measurements as in the others and the same window arrangements. The gateway passage measured 87-1/2 feet long and 43-3/4 feet wide. Its entry room faced into the outer courtyard, and it had palm tree decorations on the columns. There were eight steps leading to its entrance. A door led from the entry room of one of the inner gateways into a side room, where the meat for sacrifices was washed.