Ezekiel 40:17
Then he brought me into the outer court, and there were chambers and a pavement laid out all around the court. Thirty chambers faced the pavement,

Ezekiel 46:20
and said to me, "This is the place where the priests shall boil the guilt offering and the sin offering, and where they shall bake the grain offering, so that they do not bring them into the outer court and transmit holiness to the people."

Ezekiel 46:22
In the four corners of the outer court there were enclosed courts, each forty cubits long and thirty cubits wide. Each of the four corner areas had the same dimensions.