O my God, I recommend to Thy clemency the holy souls in purgatory, and especially those to whom I am most indebted by the bond of charity or of justice; and chiefly implore Thee in behalf of those who, during their life, have been most devout to the Blessed Sacrament; as also those who have most loved the Blessed Virgin. For this I offer Thee, my good Jesus, Thy wounds, Thy agony, Thy death, and all the merits of Thy most bitter passion. I know that it is Thy pleasure that I should pray for these holy souls, who are so worthy of Thy love. Hear, then, dear Lord, and grant this my prayer in their behalf, which I present to Thee. Amen.
From: Prayers, Promises, and Devotions for the Holy Souls in Purgatory by Susan Tassone, p. 76