Matthew 3:8-11

Produce therefore fruit worthy of repentance. And do not think to say within yourselves, We have Abraham for our father; for I say unto you, that God is able of these stones to raise up children to Abraham. And already the axe is applied to the root of the trees; every tree therefore not producing good fruit is cut down and cast into the fire. I indeed baptise you with water to repentance, but he that comes after me is mightier than I, whose sandals I am not fit to bear; he shall baptise you with the Holy Spirit and fire