Nicene and Post-Nicene Fathers, Ser. II, Vol I:
The Life of Constantine with Orations of Constantine and Eusebius.: Chapter XI

Chapter XI.—Against the Tyrants and Persecutors; and on the Captivity of Valerian.

“I cannot, then, my brother believe that I err in acknowledging this one God, the author and parent of all things: whom many of my predecessors in power, led astray by the madness of error, have ventured to deny, but who were all visited with a retribution so terrible and so destructive, that all succeeding generations have held up their calamities as the most effectual warning to any who desire to follow in their steps. Of the number of these I believe him 3316 to have been, whom the lightning-stroke of Divine vengeance drove forth from hence, and banished to your dominions and whose disgrace contributed to the fame of your celebrated triumph.

Footnotes

[Valerian, who had been a persecutor of the Christians, and whose expedition against the Persians had terminated in his own captivity, and subjection to every kind of insult and cruelty from the conquerors.—Bag.]