Matthew 3:7-9

7But when he saw many Pharisees and Sadducees coming to his immersion, he said to them, “You brood of vipers! Who warned you to flee from the coming wrath?

8Therefore produce fruit worthy of repentance;

9and do not think that you can say to yourselves, ‘We have Abraham as our father’! For I tell you that from these stones God can raise up children for Abraham.