For the Holy Souls

Eternal rest grant unto them O Lord and let perpetual light shine upon them, may their souls and the souls of all the faithful departed through the Mercy of God rest in peace

For the dying

O Merciful Jesus Lover of souls. I beseech You, by the agony of You Most Sacred Heart and by the sorrows of Your Immaculate Mother, wash clean in Your Blood the sinners of the whole world who are now in their final agony, but espically those on their way to eternal damnation and who are to die this day.

Heart of Jesus who suffered death's agony I beg You have Mercy on these poor souls.
AMEN

O merciful God,
take pity on those souls
who have no particular friends and intercessors
to recommend them to Thee, who,
either through the negligence of those who are alive,
or through length of time are forgotten
by their friends and by all.
Spare them, O Lord,
and remember Thine own mercy,
when others forget to appeal to it.
Let not the souls which Thou hast created
be parted from thee, their Creator.

May the souls of all the faithful departed,
through the mercy of God, rest in peace.

Amen.

An Offering of the Precious Blood for Souls

O My God, I beg of Thee in union with the Immaculate Heart of Mary, through the merits of the Precious Blood offered Thee in every Mass throughout the world, to grant that this day one mortal sin may be averted, one soul in doubt may be converted to the truth, one soul about to die in sin may receive the grace of repentance and a happy death, and the deliverance of that soul in Purgatory which is nearest Heaven. I wish by this offering to console the Heart of Jesus in agony for the souls lost through the teaching of error against the true Church of Christ, Jesus, Our Lord.
Amen.

Heart of Jesus, once in agony, have mercy on the dying. Heart of Jesus, ever consumed with burning love for the poor captive souls in Purgatory, be not severe in Thy judgments, but let some drops of Thy Precious Blood fall upon them and send, O Merciful Savior, Thy Angels to conduct them to a place of light, refreshment, and peace.
Amen.

Mother of Sorrows! Mother of Christ! Thou hadst influence with thy Divine Son when on earth, thou doth have the same influence now in Heaven, pray for me, obtain from thy Divine Son my request, if it be His Holy Will.
Amen.

Eternal rest grant unto them O Lord and let perpetual light shine upon them, may their souls and the souls of all the faithful departed through the Mercy of God rest in peace

Crystal, the prayers here have been used for many years (or centuries) by people devoted to helping the holy souls in purgatory, and for requesting their assistance. We add prayers from time to time, (others like Aleema are very good about it). I plan to add the Holy Souls Novena at the end of next month, but it's a very long (and very old) prayer.
I didn't take your question as intrusive, but there was so much and it was so painful and stressful.

Most loving Jesus, I humbly beseech You to offer to Your Eternal Father, on behalf of the Holy Souls in Purgatory, Your Most Precious Blood, which poured fourth from the Sacred Wounds of Your adorable body, together with Your agony and death.
AMEN

Jesus the divine mercy, i trust in you, please have mercy on the holy souls in purgatory

Wow aleema! What a wonderful testimony!

Parce domine, im sorry if i seemed intrusive...could you share advice on how to ask the souls in purgatory for a favour