וְכָל־הַפְּתָחִ֥ים וְהַמְּזוּז֖וֹת רְבֻעִ֣ים שָׁ֑קֶף וּמ֧וּל מֶחֱזָ֛ה אֶל־מֶחֱזָ֖ה שָׁלֹ֥שׁ פְּעָמִֽים׃
And all the doors with their posts were square in the frame; and light was over against light in three ranks.
Read midrashic interpretation of I Kings 7:5: and classical rabbinic exegesis.