Viper in the Bible Encyclopedia - ISBE

vi'-per ('eph`eh (Job 20:16; Isa 30:6; 59:5); echidna (Mt 3:7 = Lk 3:7; Mt 12:34; 23:33; Acts 28:3)): Several vipers are found in Israel, but it is not certain that 'eph`eh referred definitely to any of them. See SERPENT.

Read More about Viper in the Bible Encyclopedia - ISBE