The axe is already lying at the root of the trees; every tree that does not produce good fruit is cut down and thrown into the fire.”
In context
7So he said to the crowds that were coming out to be baptized by him, “Brood of vipers! Who warned you to run from the wrath that is coming? 8Produce fruit worthy of repentance, and do not start telling yourselves, ‘We have Abraham as our father.’ I tell you, God can raise up children for Abraham out of these stones. 9The axe is already lying at the root of the trees; every tree that does not produce good fruit is cut down and thrown into the fire.” 10The crowds kept asking him, “Then what should we do?” 11He answered them, “Whoever has two shirts should share with the one who has none, and whoever has food should do the same.”