2 Clement 19:1

(mid 2nd century CE)

Chapter 19. Reward of the Righteous, Although They May Suffer

So then, brothers and sisters, after the God of truth I address to you an appeal that you may give heed to the words written, that you may save both yourselves and him who reads an address in your midst.

(from http://www.newadvent.org/fathers/1011.htm)