Ezekiel 42:7-17

7 There was a wall outside parallel to the chambers, toward the outer court, opposite the chambers, fifty cubits long.
8 For the chambers on the outer court were fifty cubits long, while those opposite the temple were one hundred cubits long.
9 At the foot of these chambers ran a passage that one entered from the east in order to enter them from the outer court.
10 The width of the passage was fixed by the wall of the court. On the south also, opposite the vacant area and opposite the building, there were chambers
11 with a passage in front of them; they were similar to the chambers on the north, of the same length and width, with the same exits and arrangements and doors.
12 So the entrances of the chambers to the south were entered through the entrance at the head of the corresponding passage, from the east, along the matching wall.
13 Then he said to me, "The north chambers and the south chambers opposite the vacant area are the holy chambers, where the priests who approach the Lord shall eat the most holy offerings; there they shall deposit the most holy offerings—the grain offering, the sin offering, and the guilt offering—for the place is holy.
14 When the priests enter the holy place, they shall not go out of it into the outer court without laying there the vestments in which they minister, for these are holy; they shall put on other garments before they go near to the area open to the people."
15 When he had finished measuring the interior of the temple area, he led me out by the gate that faces east, and measured the temple area all around.
16 He measured the east side with the measuring reed, five hundred cubits by the measuring reed.
17 Then he turned and measured the north side, five hundred cubits by the measuring reed.