Matthew 3:7-9

7But when he saw many of the Pharisees and Sadducees come to his baptism, he said to them, O generation of vipers, who hath warned you to flee from the wrath to come? 8Bring forth therefore fruits worthy of repentance:1 9And think not to say within yourselves, We have Abraham for our father: for I say to you, that God is able of these stones to raise up children to Abraham.