Most Blessed Virgin Mary, my Mother, I turn to you in supplication and by that sword which pierced your sorrowful heart, when you did behold your beloved Son, Jesus Christ bow down his head and give up the ghost, I pray and beseech you to help the holy souls in Purgatory, and particularly those for whom I now pray. (Mention names here.)
Mother of Sorrows, Queen of Martyrs, for the love of your Divine Son, whose precious blood was shed for us, help us with your powerful intercession, who are in danger not only of falling into Purgatory, but of losing our souls forever in hell. O Mary, Mother of Grace, Mother of Mercy, pray for us now and at the hour of our death.
Eternal Father, throught the most Precious Blood of Jesus and the Sorrows of Mary, have pit upon the holy souls in Purgatory. Amen.
From a Novena in Honor of Our lady of Sorrows (The Encyclopedia of Mary, OSV Press, 2007).