1 Kings 6:16-20

And he built twenty cubits on the sides of the house, both the floor and the walls with boards of cedar: he even built them for it within, even for the oracle, even for the most holy place.

And the house, that is, the temple before it, was forty cubits long.

And the cedar of the house within was carved with knops and open flowers: all was cedar; there was no stone seen.

And the oracle he prepared in the house within, to set there the ark of the covenant of the LORD.

And the oracle in the forepart was twenty cubits in length, and twenty cubits in breadth, and twenty cubits in the height thereof: and he overlaid it with pure gold; and so covered the altar which was of cedar.