Rejoice not, all you of Philistia, because the rod that struck you is broken; for a viper comes forth from the root of the serpent, and his offspring shall be a fiery flying serpent.

In the end it bites like a serpent and stings like a viper.

But when he saw many of the Pharisees and Sadducees coming to his immersion, he said to them, Offspring of vipers! Who warned you to flee from the wrath to come?

Offspring of vipers! How can you, being evil, speak good things? For out of the abundance of the heart the mouth speaks.