Ezekiel 42:17

When the priests enter in, then they shall not go out of the holy place into the outer court until they lay their garments in which they minister there; for they are holy. Then they shall put on other garments, and shall approach that which is for the people.”

Now when he had finished measuring the inner house, he brought me out by the way of the gate which faces toward the east, and measured it all around.

He measured on the east side with the measuring reed five hundred reeds, with the measuring reed all around.

He measured on the south side five hundred reeds with the measuring reed.

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

He measured it on the four sides. It had a wall around it, the length five hundred cubits, and the width five hundred cubits, to make a separation between that which was holy and that which was common.