Ezekiel 40:44-47

44 Outside the inner gate, in the inner courtyard, were rooms for the singers, one facing south alongside the north gate, and one facing north alongside the east gate.
45 He said to me, "This room facing south is for the cohanim in charge of the house;
46 while the room facing north is for the cohanim in charge of the altar; these are the descendants of Tzadok, who are the descendants of Levi designated to approach ADONAI and serve him."
47 Then he measured the courtyard at 175 feet long and 175 feet wide - it was square. The altar was in front of the house.
Complete Jewish Bible Copyright 1998 by David H. Stern. Published by Jewish New Testament Publications, Inc. All rights reserved. Used by permission.