Library Pseudo-Clement Recognitions
Book 7, Chapter 11: Different Effects of Suffering on Heathens and Christians.
Peter, hearing this, shed tears of sympathy, and said to his friends who were present: If any man who is a worshipper of God had endured what this man's father has endured, immediately men would assign his religion as the cause of his calamities; but when these things happen to miserable Gentiles, they charge their misfortunes upon fate. I call them miserable, because they are both vexed with errors here, and are deprived of future hope; whereas, when the worshippers of God suffer these things, their patient endurance of them contributes to their cleansing from sin.
English translation by Thomas Smith, in Ante-Nicene Fathers, Vol. VIII (eds. Alexander Roberts, James Donaldson, and A. Cleveland Coxe; Buffalo: Christian Literature Publishing Co., 1886). Public domain. Digital text via New Advent Church Fathers.