Both ancient Egyptian and modern Oriental doors were and are hung by means of pivots turning in sockets on both the upper and lower sides. (1 Kings 7:50) In Syria, and especially the Hauran, there are many ancient doors consisting of stone slabs with pivots carved out of the same piece, inserted in sockets above and below, and fixed during the building of the house. The allusion in (Proverbs 26:14) is thus clearly explained.
Main reference: Smith's Bible Dictionary (1860s)
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