The Roman Missal: Proper of Saints, May and June (English) 23
1[May 28. St Gregory the Seventh, Pope, Conf.—Double.]
2[Mass.—Sacerdotes, for a Bishop and Confessor, page xxix.]
3Prayer. Deus in te sperantium. O God, the strength of those who hope in thee, who didst strengthen with the virtue of constancy thy blessed confessor and pontiff Gregory, to defend the liberty of the church; grant us by his example and intercession, courageously to overcome all opposition. Through our Lord, &c.
4[Commemoration of the Octave of St Augustin, by the Prayer, Secret and Postcommunion of the Mass on his Feast, May 26, as above, page—]