וְאֶ֤רֶז אֶל־הַבַּ֙יִת֙ פְּנִ֔ימָה מִקְלַ֣עַת פְּקָעִ֔ים וּפְטוּרֵ֖י צִצִּ֑ים הַכֹּ֣ל אֶ֔רֶז אֵ֥ין אֶ֖בֶן נִרְאָֽה׃
And the cedar on the house within was carved with knops and open flowers; all was cedar; there was no stone seen.
Read kabbalistic (mystical) interpretation of I Kings 6:18: and classical mystical sources.