Ezekiel 46:21-24

Then he brought me out into the outer courtyard and led me across to the four corners of the courtyard; and behold, in every corner of the courtyard there was a small courtyard. In the four corners of the courtyard there were enclosed courtyards, forty cubits long and thirty wide; these four in the corners were the same size. There was a row of masonry all around inside them, around [each of] the four courtyards, and it was made with cooking hearths under the rows all around. Then he said to me, “These are the kitchens of the cooks, where the ministers (Levites) of the temple shall boil (cook) the sacrifices of the people.”