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Smith's Bible Dictionary
Tu'bal-cain. The son of Lamech, the Cainite, by his wife, Zillah, Genesis 4:22. (B.C. about 3000). He is called "a furbisher of every cutting instrument of copper and iron."
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Smith, William, Dr. Entry for 'Tubal-cain'. Smith's Bible Dictionary. https://www.studylight.org/dictionaries/eng/sbd/t/tubal-cain.html. 1901.