15 But enough of consolation. It is time for us now, at last, to proceed to the exhortation on the subject of avoiding oaths, and to remove that seeming palliation on behalf of those who swear, which is but futile, and useless. For when we bring an accusation against them, they allege the case of others who do the very same thing; and they say, “such and such persons swear.” Let us then say to these, Nevertheless; such a man does not swear: and God will give His judgment concerning you, from those who do good works; for sinners do not profit sinners by fellowship in transgressions; but they who perform what is right condemn sinners. For they who gave not Christ food, or drink, were many; but they rendered no aid to each other. Similar also was the case of the five virgins, who found no pardon from companionship, but being condemned by a comparison with those who had acted wisely, both these and the former were alike punished.
Source: Homilies on the Statues (New Advent)