Matthew 3:7
But when he saw many of the Pharisees and Sadducees come to his baptism, he said to them, O generation of vipers, who has warned you to flee from the wrath to come?
Nave's Topical Index—AKJV

Matthew 23:33
You serpents, you generation of vipers, how can you escape the damnation of hell?
Nave's Topical Index—AKJV

Luke 3:7
Then said he to the multitude that came forth to be baptized of him, O generation of vipers, who has warned you to flee from the wrath to come?
Nave's Topical Index—AKJV