Eternal rest grant unto them, O Lord, and let perpetual light shine upon them. May they rest in peace. Amen. May their souls, and the souls of all the faithful departed, through the mercy of God, rest in peace. Amen.
Prayer of Saint Gertrude the Great
"Eternal Father, I offer Thee the Most Precious Blood of Thy Divine Son, Jesus, in union with the Masses said throughout the world today, for all the Holy Souls in Purgatory, for sinners everywhere, for sinners in the universal Church, those in my own home, and within my family. Amen."
Some Scriptural References on Purgatory
2 Maccabees 12:38-46
1 Corinthians 3:10-15
1 Peter 3:18-22
1 Peter 4:6
Spiritual Work of Mercy: Request a Set of 30 Gregorian Masses for a Holy Soul in Purgatory.