Praying that the Lord be merciful in judging those who have gone before us in faith is a deeply rooted tradition.  This particular novena (a word which represents a 9-day period of prayer) comes from the Philippine culture.   It may be used in its entirety, or adapted according to need.
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DECADE OF THE PASSION

THE SORROWFUL MYSTERIES

1.  The Agony in the Garden
2.  Scourging at the Pillar
3.  Crowning with Thorns
4.  Carrying of the Cross
5.  The Crucifixion & Death on the Cross

Lord, open our lips and inflame our hearts and cleanse them of useless and evil thoughts.  Enlighten our minds that we may seriously meditate on Your suffer and death, and the pains endured by Your mother.  Hear and receive us before Your great majesty, for you who live and reign forever and ever.  Amen.

(On the beads of the rosary for the Our Father, say the following)

Oh Most Merciful Jesus, look down with eyes of pity on the faithful souls for whom You suffered and died on the Cross.

(On the beads of the Hail Mary, say the following)

1.     My Jesus, through your bloody sweat in the garden
R. Have mercy on the soul of N.
2.     My Jesus, through the blow You received on Your Sacred Face
R. Have mercy on the soul of N.
3.     My Jesus, through the cruel scourging You endured
R. Have mercy on the soul of N.
4.     My Jesus, through the crown of thorns that pierced Your head
R. Have mercy on the soul of N.
5.     My Jesus, through Your carrying of the Cross on the path of bitterness
R. Have mercy on the soul of N.
6.     My Jesus, through Your face covered with blood which you allowed to be imprinted on the veil of Veronica
R. Have mercy on the soul of N.
7.     My Jesus, through your bloody garments that were cruelly removed from Your wounded Body
R. Have mercy on the soul of N.
8.     My Jesus, through Your Holy Body nailed on the Cross
R. Have mercy on the soul of N.
9.     My Jesus, through Your Hands and Feet pierced with cruel nails
R. Have mercy on the soul of N.
10.     My Jesus, through Your Sacred side pierced with the lance and from which flowed blood and water
R. Have mercy on the soul of N.
V.   Eternal rest grand unto her/him O Lord
R. And let perpetual light shine upon her/him
V.   May s/he rest in peace
R. Amen

OFFERING

Most sweet Jesus, who in Your desire to redeem the world, deigned to be born, to be mocked, to fall into the hands of Your enemies through the treacherous kiss of Judas, to be bound and brought to the place of sacrifice like the meek lamb, brought before Caiphas, Pilate, and Herod, spat on, accused and condemned with false witnesses, to be slapped and have Your sacred body covered with wounds from the cruel scourging, to be crowned with thorns, Your face covered with a purple cloth in mockery, stripped of Your garments, nailed and elevated on the cross between two thieves as if You were one of them, offered gall and vinegar to drink, and to be pierced in Your side with a lance, deliver, O Lord, the souls in purgatory from their great sufferings through Your most bitter Passion; bring them to Your glory and deliver us from the pains of hell, through the merits of Your Holy Passion and Death on the Cross, so that we may enter that Kingdom where You brought the good thief who was crucified with You, who lives and reigns with the Father and the Holy Spirit, One God forever and ever.  Amen.

LITANY FOR THE FAITHFUL DEPARTED

Lord, have mercy on us
R. Lord, Have mercy on us.
Christ, have mercy on us
R. Christ, Have mercy on us.
Lord, have mercy on us
R. Lord, Have mercy on us.
Christ, hear us
R. Christ, graciously hear us.
God the Father of Heaven
R. Have mercy on the soul of N.
God the Son, Redeemer of the World
R. Have mercy on the soul of N.
God the Holy Spirit
R. Have mercy on the soul of N.
Holy Trinity, One God
R. Have mercy on the soul of N.
Holy Mary
R. Pray for the soul of N.
Holy Mother of God
R. Pray for the soul of N.
Holy Virgin of Virgins
R. Pray for the soul of N.
St. Michael
R. Pray for the soul of N.
All you Angels & Archangels
R. Pray for the soul of N.
St. John the Baptist
R. Pray for the soul of N.
St. Joseph
R. Pray for the soul of N.
All you holy Patriarchs and Prophets
R. Pray for the soul of N.
St. Peter
R. Pray for the soul of N.
St. Paul
R. Pray for the soul of N.
St. John
R. Pray for the soul of N.
All you holy Apostles & Evangelists
R. Pray for the soul of N.
St. Stephen
R. Pray for the soul of N.
St. Lawrence
R. Pray for the soul of N.
All you holy martyrs
R. Pray for the soul of N.
St. Gregory
R. Pray for the soul of N.
St. Ambrose
R. Pray for the soul of N.
St. Augustine
R. Pray for the soul of N.
St. Jerome
R. Pray for the soul of N.
All you holy bishops and confessors
R. Pray for the soul of N.
All you holy monks & hermits
R. Pray for the soul of N.
St. Mary Magdalene
R. Pray for the soul of N.
St. Barbara
R. Pray for the soul of N.
All holy virgins and widows
R. Pray for the soul of N.
All you saints of God
R. Pray for the soul of N.
Be merciful
R. Spare her/him O Lord
Be merciful
R. Graciously hear us, O Lord
From all evil
R. O Lord, deliver her/his soul
From Your wrath
R. O Lord, deliver her/his soul
From the rigor of Your justice
R. O Lord, deliver her/his soul
From the power of evil
R. O Lord, deliver her/his soul
From the gnawing worm of conscience
R. O Lord, deliver her/his soul
From enduring sorrow
R. O Lord, deliver her/his soul
From eternal flames
R. O Lord, deliver her/his soul
From intolerable cold
R. O Lord, deliver her/his soul
From everlasting darkness
R. O Lord, deliver her/his soul
From dreadful weeping & wailing
R. O Lord, deliver her/his soul
From your admirable conception
R. O Lord, deliver her/his soul
Through Your Holy Birth
R. O Lord, deliver her/his soul
Through Your most sweet Name
R. O Lord, deliver her/his soul
Through Your Baptism & Holy Fasting
R. O Lord, deliver her/his soul
Through Your most profound humiliation
R. O Lord, deliver her/his soul
Through Your prompt obedience
R. O Lord, deliver her/his soul
Through Your infinite love
R. O Lord, deliver her/his soul
Through Your bloody sweat.
R. O Lord, deliver her/his soul
Through Your sorrow & anguish
R. O Lord, deliver her/his soul
Through Your bonds
R. O Lord, deliver her/his soul
Through Your scourging
R. O Lord, deliver her/his soul
Through Your crowning with thorns
R. O Lord, deliver her/his soul
Through Your carrying of the Cross
R. O Lord, deliver her/his soul
Through Your most cruel death
R. O Lord, deliver her/his soul
Through Your most holy wounds
R. O Lord, deliver her/his soul
Through Your most bitter cross & passion
R. O Lord, deliver her/his soul
Through Your Holy Resurrection
R. O Lord, deliver her/his soul
Through Your admirable Ascension
R. O Lord, deliver her/his soul
Through the coming of the Holy Spirit
R. O Lord, deliver her/his soul
On the Day of Judgment
R. O Lord, deliver her/his soul
We sinners
R. We beseech You hear us
You who forgave Magdalene & answered the prayer of the thief
R. We beseech You hear us
You who freely saves Your elect
R. We beseech You hear us
You who have the keys of Heaven & hell
R. We beseech You hear us
That you would be pleased to deliver the souls of our parents, relations, friends & benefactors from the pains of hell
R. We beseech You hear us
That you would be pleased to have mercy on those of whom no special remembrance is made on earth
R. We beseech You hear us
That you would be pleased to grant them all the pardon & remission of all their sins
R. We beseech You hear us
That you would be pleased to fulfill all their desires
R. We beseech You hear us
That you would be pleased to receive them into the company of the blessed
R. We beseech You hear us
King of Majesty
R. We beseech You hear us
Son of God
R. We beseech You hear us
Lamb of God, who takes away the sins of the world
R. Grant her/him rest
Lamb of God, who takes away the sins of the world
R. Grant her/him rest
Lamb of God, who takes away the sins of the world
R. Grant her/him rest everlasting
Christ, hear us
R. Christ, graciously hear us
Lord, Have mercy
R. Christ have mercy
From the gates of hell
R. Deliver her/his soul, O Lord
O Lord, hear my prayer
R. And let my cry come to You

LET US PRAY

O God, the Creator & Redeemer of all the faithful, grant to the soul of Your departed servant N. the remission of her/his sins; that by prayers, s/he may obtain that pardon which s/he has always desired.  Grant this, O God, who lives and reigns forever & ever.  Amen.

O Eternal God, who besides the general precept of charity, has commanded a particular respect to parents, kindred & benefactors; grant, we beseech You, that as they were the instruments by which Your Providence bestowed on us our birth, education and innumerable other blessings, so our prayers may be the means to obtain for her/him a speedy release from her/his suffering, and free admittance to Your infinite joys, through Jesus Christ, our Lord, Amen.

O God, whose nature is ever to have mercy and to spare, we humbly beseech You on behalf of Your servant, N., whom You have called out of this world.  That You would not deliver her/him into the hands of the enemy nor forget her/him forever, but bid Your holy angels, lead her/him into paradise, her/his true country, that for as much as in You s/he put her/his hope and trust, s/he may not endure the pains of hell, but may come to the possession of eternal joys.  Through our Lord, Jesus Christ, Your Son, who lives and reigns with You in the unity of the Holy Spirit, one God forever and ever,  Amen.

Be merciful, we implore You O Lord, to the soul of Your servant, N., for whom we offer to You this sacrifice of praise, humbly beseeching Your majesty that, by those holy and propitiary offerings, s/he may be found worthy to win everlasting rest.  Through Our Lord Jesus Christ, Your Son, who lives and reigns with You in the unity of the Holy Spirit, one God forever and ever.  Amen.

Grant, we beseech You, Almighty God, that the soul of Your servant, N., which has departed from this world, may be cleansed by this sacrifice, and delivered from sins, and may receive forgiveness and everlasting rest.  Through Our Lord Jesus Christ, Your Son, who lives and reigns with You in the unity of the Holy Spirit, one God forever and ever.  Amen.

Absolve, O Lord, the soul of You servant, N., from every stain of sin, so that by Your aid s/he may escape the judgment of wrath, and come to the enjoyment of beatitude in eternal light.

V. Eternal rest grant to her/him O Lord
V. From the gates of hell
V. May s/he rest in peace
V. O Lord, hear my prayer
V. The Lord be with you
R. And let perpetual light shine upon her/him
R. Deliver her/his soul, O Lord
R. Amen
R. And let my cry come to You
R. And also with you


LET US PRAY

O God, the Creator and Redeemer of all the faithful, grant N., the remission of all her/his sins, that through our prayers s/he may obtain the pardon s/he has always desired, for You live and reign for ever and ever.  Amen.

V. Eternal rest grant to her/him O Lord
V. May she/he rest in peace
R. And let perpetual light shine upon her/him
R. Amen