Romans 12:14

Clement of Alexandria Stromata Book IV

There is clearly described the perfect righteousness, fulfilled both in practice and contemplation. Wherefore we are "to bless those who persecute us. Bless, and curse not."[140]

Origen Against Celsus Book VIII

and this is intended to prevent the formation of the habit of reviling any one whatever; for we have been taught, "Bless, and curse not,"[83]

Cyprian Treatise XII Three Books of Testimonies Against the Jews

Of this same thing to the Romans: "Blessing, and not cursing."[461]

Lactantius Divine Institutes Book VI

He must not receive a gift from a poor man; so that if he himself has afforded anything, it may be good, inasmuch as it is gratuitous. If any one reviles, he must answer him with a blessing;[132]