Matthew 3:7

"But when he saw many of the Pharisees and Sadducees come to his baptism, he said unto them, O generation of vipers, who hath warned you to flee from the wrath to come?"
Matthew 3:7 (KJV)

Context from Matthew 3

5

Then went out to him Jerusalem, and all Judaea, and all the region round about Jordan,

6

And were baptized of him in Jordan, confessing their sins.

7

But when he saw many of the Pharisees and Sadducees come to his baptism, he said unto them, O generation of vipers, who hath warned you to flee from the wrath to come?

8

Bring forth therefore fruits meet for repentance:

9

And think not to say within yourselves, We have Abraham to our father: for I say unto you, that God is able of these stones to raise up children unto Abraham.