Ezekiel 42:19-20 Amplified Bible (AMP)

19. He turned about to the west side and measured five hundred reeds with the measuring reed.

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

Ezekiel 42