58 Many dioceses and Christian communities in mission territories are being harassed by difficulties and sometimes even by active persecution. We therefore exhort everyone to persevere courageously in the battle which he is fighting for God's cause: the pastors who are giving their children in God the example of a faith which does not falter even in mortal danger; and the faithful who are being so grievously tried by adversity and are therefore so dear to the Sacred Heart of Jesus, who promised beatitude and abundant rewards to those who suffer persecution for justice' sake. (54) God, in His inscrutable but always merciful designs, will sustain them with heavenly favors, consolations, and joy. The whole Church is united with the persecuted in a communion of prayer and sorrow, with the certainty that final victory will be hers.
Source: Princeps Pastorum (Vatican.va)