Me exspectaverunt peccatores, ut perderent me: testimonia tua, Domine, intellexi: omnis consummationis vidi finem: latum mandatum tuum nimis. * Beati immaculati in via: qui ambulant in lege Domini.
The wicked have waited for me to destroy me: but I have understood Thy testimonies, O Lord: I have seen an end of all perfection: The commandment is exceeding broad. * Blessed are the undefiled in the way: who walk in the law of the Lord.
(Psalm 118:95-96,1 from the Introit of Mass)
May blessed Margaret Thy virgin and martyr, we beseech Thee, O Lord, implore for us Thy forgiveness; for she was ever pleasing unto Thee, both by the merit of her chastity, and by her confession of Thy power.
From the Catholic Encyclopaedia: http://www.newadvent.org/cathen/09652b.htm