Ezekiel 42:15-20

Now when he had finished measuring the inner temple, he brought me out through the gateway that faces toward the east, and measured it all around. He measured the east side with the measuring rod, five hundred rods by the measuring rod all around. He measured the north side, five hundred rods by the measuring rod all around. He measured the south side, five hundred rods by the measuring rod. He came around to the west side and measured five hundred rods by the measuring rod. He measured it on the four sides; it had a wall all around, five hundred cubits long and five hundred wide, to separate the holy areas from the common.