Deuteronomy 8:15

Who led thee through that great and terrible wilderness, wherein were fiery serpents , etc. "The fiery serpent" and "the scorpion" (sing.) are in apposition to the "wilderness," and illustrate its terribleness. Fiery serpents— ὔφεις τοὺς θανατοῦνσας LXX .—or burning serpents, so called from the burning pain caused by their bite; probably the cerastes, or one of the naja species (cf. Numbers 21:6 ).