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.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: ubi sup.