5 Whilst offering the oblation, I heard that a certain Castulus, who, the Arians said, was a priest, had been seized by the people. Passers-by had come upon him in the streets. I began to weep bitterly, and to implore God in the oblation that He would come to our aid, and that no one's blood be shed in the Church's cause, or at least that it might be my blood shed for the benefit not of my people only, but also for the unbelievers themselves. Not to say more, I sent priests and deacons and rescued the man from violence.
Source: Letters (New Advent)