Matthew 3:7-9

7But seeing many of the Pharisees and Sadducees coming to his baptism, he said to them, Offspring of vipers, who has forewarned you to flee from the coming wrath?

8Produce therefore fruit worthy of repentance.

9And do not think to say within yourselves, We have Abraham for [our] father; for I say unto you, that 1God is able of these stones to raise up children to Abraham.