To Cornelius in Exile, Concerning His Confession.
Cyprian Praises in Cornelius and His People Their Confession of the Name of Christ Even to Banishment; And Exhorts Them to Constancy and to Mutual Prayer for One Another, as Well in Respect of the Approaching Day of Struggle in This Life, as After Death.
Source: The Epistles of Cyprian (New Advent)