Matthew 3:7-9

But when he saw many Pharisees and Sadducees coming to watch him baptize, he denounced them. “You brood of snakes!” he exclaimed. “Who warned you to flee the coming wrath? Prove by the way you live that you have repented of your sins and turned to God. Don’t just say to each other, ‘We’re safe, for we are descendants of Abraham.’ That means nothing, for I tell you, God can create children of Abraham from these very stones.