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Smith's Bible Dictionary
Ti'dal. (great son). Tidal is mentioned only in Genesis 14:1; Genesis 14:9. (B.C. about 1900). He is called "king of nations," from which we may conclude that he was a chief over various nomadic tribes, who inhabited different portions of Mesopotamia, at different seasons of the year, as do the Arabs at the present day.
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Smith, William, Dr. Entry for 'Tidal'. Smith's Bible Dictionary. https://www.studylight.org/dictionaries/eng/sbd/t/tidal.html. 1901.