John Chrysostom
Catena Aurea · Lukasevangelium 3
Then said he to the multitude that came forth to be baptized of him, O generation of vipers, who hath warned you to flee from the wrath to come? Bring forth therefore fruits worthy of repentance, and begin not to say within yourselves, We have Abraham to our father: for I say unto you, That God is able of these stones to raise up children unto Abraham. And now also the axe is laid unto the root of the trees: every tree therefore which bringeth not forth good fruit is hewn down, and cast into the fire,
(ubi sup.) For it is not sufficient for the penitent to leave off his sins, he must also bring forth the fruits of repentance, as it is in the Psalms, depart from evil and do good, (Ps. 34:14.) just as in order to heal, it will not do to pluck out the arrow only, but we must also apply a salve to the wound. But he says not fruit, but fruits, signifying abundance.