John Gill Commentary 1 Kings 7:11

"And above were costly stones, even hewn stone, according to measure, and cedar-wood." — 1 Kings 7:11 (ASV)

And above were costly stones Above the foundation, from thence to the top of the buildings; the whole walls were made of such right up to the ceiling:

after the measure of hewed stones ; which, according to the Rabbins, as Kimchi says, were five hands breadth:

and cedars ; beams of cedars over them, or these, both the foundation and the walls, were lined with them.