1 Kings 6:8-12

The doorway for the lowest side chamber was on the right side of the house; and they would go up by a winding staircase to the middle story, and from the middle to the third.

So he built the house and finished it; and he covered the house with beams and planks of cedar.

He also built the stories against the whole house, each five cubits high; and they were attached to the house with timbers of cedar.

Now the word of the Lord came to Solomon, saying,

“As for this house which you are building, if you will walk in My statutes and execute My ordinances and keep all My commandments by walking in them, then I will fulfill My word with you which I spoke to David your father.