Philo Judaeus Legatio Ad Gaium 356

[356] And when we all cried out with one accord, "O Lord Caius, we are falsely accused; for we did sacrifice, and we offered up entire hecatombs, the blood of which we poured in a libation upon the altar, and the flesh we did not carry to our homes to make a feast and banquet upon it, as it is the custom of some people to do, but we committed the victims entire to the sacred flame as a burnt offering: and we have done this three times already, and not once only; on the first occasion when you succeeded to the empire, and the second time when you recovered from that terrible disease with which all the habitable world was afflicted at the same time, and the third time we sacrificed in hope of your victory over the Germans."