Luke 3:7-9

So he began saying to the crowds who were going out to be baptized by him, “You brood of vipers, who warned you to flee from the wrath to come? Therefore bear fruits in keeping with repentance, and do not begin to say to yourselves, ‘We have Abraham for our father,’ for I say to you that from these stones God is able to raise up children to Abraham. Indeed the axe is already laid at the root of the trees; so every tree that does not bear good fruit is cut down and thrown into the fire.”