Quotation su Ezechiele 41:27

The doorway of the Hekhal was twenty cubits high and ten broad. It had four doors, two on the inner side, and two on the outer, as it says, “And the Hekhal and the Sanctuary had two doors” (Ezekiel 41:23). The outer ones opened into the interior of the doorway so as to cover the thickness of the wall, while the inner ones opened into the Temple so as to cover the space behind the doors, because the whole of the Temple was overlaid with gold except the space behind the doors. Rabbi Judah says: they stood within the doorway, and they resembled folding doors. These were two cubits and a half [of the wall] and these were two cubits and a half, leaving half a cubit as a doorpost at the one end and half a cubit as a doorpost at the other end, as it says, “And the doors had two leaves apiece, two turning leaves, two leaves for the one door and two leaves for the other” (Ezekiel 41:24).