Here is the actual prayer from the breviary for the feast of St. Pope Pius V.
O God, Who when Thou wast pleased to break them that hate thy Church, and to restore again the solemn worship of thyself, didst choose the blessed Pope Pius to work for thee in that matter, grant that he may still be a tower of strength for us. Grant that we also may be more than conquerors over that make war upon our souls, and in the end may enter into perfect peace in thy presence.
Deus, qui ad conterendos Ecclesiae tuae hostes, et ad divinum cultum reparandum, beatum Pium Pontificem Maximum eligere dignatus es: fac nos ipsius defendi praesidiis, et ita tuis inhaerere obsequiis; ut omnium hostium superatis insidiis, perpetua pace laetemur.
The original author of this blog passed away in July of 2016. RIP Father Carota.