Asp
(Heb. pethen), translated (adder in) Ps 58:4; 91:13 Probably the Egyptian cobra, a small and very poisonous serpent, a dweller in the holes of walls, Isa 11:8 and a snake upon which the serpent-charmers practiced their art.
Bibliography Information Smith, William, Dr "Definition for 'Asp' Smiths Bible Dictionary". bible-history.com - Smiths; 1901.