Præsta, quæsumus, omnípotens Deus : ut beáti Petri Mártyris tui fidem congrua devotióne sectemur ; qui pro ejúsdem fídei dilatatióne martyrii palmam méruit obtinére. Per Dóminum.
O God, who didst vouchsafe to blessed Peter thy Martyr to win the crown of martyrdom in the preaching of the Faith : grant, we pray thee ; that we may imitate him in all devout following of the same. Through Jesus Christ our Lord.