(Heb. pethen ), translated (adder in) (Psalms 58:4; 91:13) Probably the Egyptian cobra, a small and very poisonous serpent, a dweller in the holes of walls, (Isaiah 11:8) and a snake upon which the serpent-charmers practiced their art.
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Smith, William, Dr. "Entry for 'Asp'". "Smith's Bible Dictionary".