My Jesus, by the sorrows Thou didst suffer in Thine agony in the Garden, in Thy scourging and crowning with thorns, on the way to Calvary, in Thy crucifixion and death, have mercy on the souls in purgatory, and especially on those that are most forsaken; do Thou deliver them from the terrible torments they endure; call them and admit them to Thy most sweet embrace in paradise. Amen.
Further reading
Remembering Christ’s Passion, this prayer asks mercy for the souls in purgatory, especially those who are most forsaken. Susan Tassone’s Praying with the Saints for the Holy Souls in Purgatory offers prayers and devotional practices for readers who wish to make that intercession part of their own prayer life.
Praying with the Saints for the Holy Souls in Purgatory by Susan Tassone (paperback) on Amazon (paid link)