Ezekiel 42:15-20

15Now when he had finished measuring the inner temple, he brought me out toward the gate which faced east and measured the outer area all around.

16He measured the east side with the measuring rod, five hundred rods by the measuring rod.

17He measured the north side, five hundred rods by the measuring rod.

18He measured the south side, five hundred rods by the measuring rod.

19He turned about to the west side and measured five hundred rods by the measuring rod.

20He measured it on the four sides; it had a wall all around, the length five hundred and the width five hundred, to make a separation between that which was holy [the temple proper] and that which was common [the outer area].