שָֽׁנֲנ֣וּ לְשׁוֹנָם֮ כְּֽמוֹ־נָ֫חָ֥שׁ חֲמַ֥ת עַכְשׁ֑וּב תַּ֖חַת שְׂפָתֵ֣ימוֹ סֶֽלָה׃
They have sharpened their tongue like a serpent; Vipers' venom is under their lips. Selah
Avot D'Rabbi Natan
The snake has six names: [Nahash], Saraf, Tanin, Tzifoni, Efeh, and Akhshuv.