Melachim Alef 6:16-18

Orthodox Jewish Bible

¹⁶ And he built twenty cubits on the sides of the Beis [Hamikdash], from the floor to the rafters with boards of cedar; he even built them for it within, even for the Debir, even for the Kodesh HaKodashim.

¹⁷ And the Beis, that is, the Heikhal in front of it, was forty cubits long.

¹⁸ And the cedar of the Beis [Hamikdash] within was carved with gourds and open flowers; all was cedar; there was no stone seen.