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Smith's Bible Dictionary
Mattock. Isaiah 7:25. The tool used in Arabia for loosening the ground, described by Neibuhr, answers generally to our mattock or grubbing-axe, that is, a single-headed pickaxe. The ancient Egyptian hoe was of wood, and answered for hoe, spade and pick.
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Smith, William, Dr. Entry for 'Mattock'. Smith's Bible Dictionary. https://www.studylight.org/dictionaries/eng/sbd/m/mattock.html. 1901.