Vultum tuum deprecabuntur omnes divites plebis: adducentur regi virgines post eam: proximae ejus adducentur tibi in laetitia et exsultatione. * Eructavit cor meum verbum bonum: dico ego opera mea regi.
All the rich among the people shall entreat thy countenance: after her shall virgins be brought to the King: her neighbours shall be brought to thee in gladness and rejoicing. * My heart hath spoken a good word: I speak my works to the King.
(Psalm 44:13-16,2 from the Introit of Mass)
Hear us, O God our Saviour; that as we rejoice in the festivity of blessed Petronilla Thy virgin, so we may learn therefrom loving devotion towards Thee.
From the Catholic Encyclopaedia: http://www.newadvent.org/cathen/11781b.htm