Ezekiel 40:2

Now it happened in the thirtieth year, on the fifth day of the fourth month, while I was by the river Chebar among the exiles, that the heavens were opened, and I saw visions of God.

Then he brought me to the nave and measured the side pillars; six cubits wide on each side was the width of the side pillar.

“This is the law of the house: within its entire boundary, on the top of the mountain all around, shall be most holy. Behold, this is the law of the house.

And he carried me away in the Spirit to a great and high mountain, and showed me the holy city, Jerusalem, coming down out of heaven from God,