1 Kings 6:5

Then Hezekiah ordered them to prepare rooms in the house of Yahweh, and they prepared them.

Hear the voice of my supplications when I cry to You for help, When I lift up my hands toward Your holy sanctuary.

And He built His sanctuary like the heights, Like the earth which He has founded forever.

“Go to the house of the Rechabites and speak to them and bring them into the house of Yahweh, into one of the chambers, and give them wine to drink.”

He measured its length, twenty cubits, and the width, twenty cubits, before the nave; and he said to me, “This is the Holy of Holies.”

Then he measured the wall of the house of Yahweh, six cubits; and the width of the side chambers, four cubits, all around about the house on every side.

The side chambers were in three stories, one above another, and thirty in each story; and the side chambers extended to the wall which stood on their inward side all around, that they might be fastened, and not be fastened into the wall of the house itself.