Isteghasa -Imam Mahdi (ajtfs)

In his book of al-Kalim al-Tayyib, Sayyid `Ali Khan says, “The following is a form of seeking aid petition from The Argument of Allah and the Patron of the Age (Imam al-Mahdi)—peace be upon him: Wherever you are, you may take ghusl ,offer a two-unit prayer,(beneath the sky). reciting Surah al-Fatihah and any other sura in each unit. Yet, it is preferable to read Surah al-Fath (No. 48) in the first unit and Surah al-Nasr (No. 110) in the second.
You may then stand up, facing the kiblah direction under the sky and then say the following: Salaamullah al-Kaamel….
Also see Isteghatha -mentioned by Ayt Behjat

سَلاَمُ ٱللَّهِ ٱلْكَامِلُ ٱلتَّامُّ
salamu allahi alkamilu alttammu
Peace of Allah—perfect, complete,
ٱلشَّامِلُ ٱلْعَامُّ
alshshamilu al`ammu
comprehensive, and thorough;
وَصَلَوَاتُهُ ٱلدَّائِمَةُ
wa salawatuhu aldda'imatu
and His endless benedictions
وَبَرَكَاتُهُ ٱلْقَائِمَةُ ٱلتَّامَّةُ
wa barakatuhu alqa'imatu alttammatu
and His everlasting, perfect blessings
عَلَىٰ حُجَّةِ ٱللَّهِ
`ala hujjati allahi
be upon the Argument of Allah,
وَوَلِيِّهِ فِي ارْضِهِ وَبِلادِهِ
wa waliyyihi fi ardihi wa biladihi
His representative in His lands and realm,
وَخَلِيفَتِهِ عَلَىٰ خَلْقِهِ وَعِبَادِهِ
wa khalifatihi `ala khalqihi wa `ibadihi
His viceroy among His creatures and servants,
وَسُلالَةِ ٱلنُّبُوَّةِ
wa sulalati alnnubuwwati
the offspring of Prophethood,
وَبَقِيَّةِ ٱلْعِتْرَةِ وَٱلصَّفْوَةِ
wa baqiyyati al`itrati walssafwati
the completion of the (Holy) Progeny and the Choice Ones,
صَاحِبِ ٱلزَّمَانِ
sahibi alzzamani
the Patron of the Age,
وَمُظْهِرِ ٱلإِيـمَانِ
wa muzhiri al-imani
the demonstrator of the (true) faith,
وَمُلَقِّنِ احْكَامِ ٱلْقُرْآنِ
wa mulaqqini ahkami alqur'ani
the teacher of the laws of the Qur’an,
وَمُطَهِّرِ ٱلارْضِ
wa mutahhiri al-ardi
the purger of the earth,
وَنَاشِرِ ٱلْعَدْلِ فِي ٱلطُّولِ وَٱلْعَرْضِ
wa nashiri al`adli fi alttuli wal`ardi
the spreader of justice all over the earth,
وَٱلْحُجَّةِ ٱلْقَائِمِ ٱلْمَهْدِيِّ
walhujjati alqa'imi almahdiyyi
the Argument (al-Hujjah), the Riser (al-Qa’im), the Well-guided (al-Mahdi),
ٱلإِمَامِ ٱلْمُنْتَظَرِ ٱلْمَرْضِيِّ
al-imami almuntazari almardiyyi
the Leader, the Awaited, the Pleased,
وَٱبْنِ ٱلائِمَّةِ ٱلطَّاهِرِينَ
wabni al-a'immati alttahirina
the descendant of the Infallible Imams,
ٱلْوَصِيِّ ٱبْنِ ٱلاوْصِيَاءِ ٱلْمَرْضِيِّينَ
alwasiyyi ibni al-awsiya'i almardiyyina
the Successor, the son of the Pleased Successors (of the Prophets),
ٱلْهَادِي ٱلْمَعْصُومِ
alhadi alma`sumi
the Guide, the Immaculate,
ٱبْنِ ٱلائِمَّةِ ٱلْهُدَاةِ ٱلْمَعْصُومِينَ
ibni al-a'immati alhudati alma`sumina
and the son of the Imams—the guides and immaculate.
السَّلاَمُ عَلَيْكَ يَا مُعِزَّ ٱلْمُؤْمِنِينَ ٱلْمُسْتَضْعَفِينَ
alssalamu `alayka ya mu`izza almu'minina almustad`afina
Peace be upon you, O grantor of dignity to the oppressed and faithful ones.
السَّلامُ عَلَيْكَ يَا مُذِلَّ ٱلْكَافِرِينَ ٱلْمُتَكَبِّرِينَ ٱلظَّالِمِينَ
alssalamu `alayka ya mudhilla alkafirina almutakabbirina alzzalimina
Peace be upon you, O humiliator of the arrogant and oppressing unbelievers.
السَّلامُ عَلَيْكَ يَا مَوْلايَ يَا صَاحِبَ ٱلزَّمَانِ
alssalamu `alayka ya mawlaya ya sahiba alzzamani
Peace be upon you, O my master, the Patron of the Age.
السَّلامُ عَلَيْكَ يَا بْنَ رَسُولِ ٱللَّهِ
alssalamu `alayka yabna rasuli allahi
Peace be upon you, O son of Allah’s Messenger.
السَّلامُ عَلَيْكَ يَا بْنَ امِيرِ ٱلْمُؤْمِنِينَ
alssalamu `alayka yabna amiri almu'minina
Peace be upon you, O son of the Commander of the Believers.
السّلامُ عَلَيْكَ يَا بْنَ فَاطِمَةَ ٱلزَّهْرَاءِ
alssalamu `alayka yabna fatimata alzzahra'i
Peace be upon you, O son of Fatimah the Luminous
سَيِّدَةِ نِسَاءِ ٱلْعَالَمِينَ
sayyidati nisa'i al`alamina
and the Doyenne of the women of the world.
السَّلامُ عَلَيْكَ يَا بْنَ ٱلائِمَّةِ ٱلْحُجَجِ ٱلْمَعْصُومِينَ
alssalamu `alayka yabna al-a'immati alhujaji alma`sumina
Peace be upon you, O son of the Imams—the arguments (of Allah) and Immaculate
وَٱلإِمَامُ عَلَىٰ ٱلْخَلْقِ اجْمَعِينَ
wal-imamu `ala alkhalqi ajma`ina
and the leader of all creatures.
السَّلامُ عَلَيْكَ يَا مَوْلايَ
alssalamu `alayka ya mawlaya
Peace be upon you, O my master
سَلامَ مُخْلِصٍ لَكَ فِي ٱلْوِلايَةِ
salama mukhlisin laka fi alwilayati
addressed by him who is loyal to your (divinely commissioned) leadership.
اشْهَدُ انَّكَ ٱلإِمَامُ ٱلْمَهْدِيُّ قَوْلاً وَفِعْلاً
ash-hadu annaka al-imamu almahdiyyu qawlan wa fi`lan
I bear witness that you are the well-guided Imam in word and deed,
وَانْتَ ٱلَّذِي تَمْلَا ٱلارْضَ قِسْطاً وَعَدْلاً
wa anta alladhi tamla'u al-arda qistan wa `adlan
it is you who shall fill the earth with justice and impartiality
بَعْدَ مَا مُلِئَتْ ظُلْماً وَجَوْراً
ba`dama muli'at zulman wa jawran
after it will be filled with wrong and partiality.
فَعَجَّلَ ٱللَّهُ فَرَجَكَ
fa`ajjala allahu farajaka
So, may Allah hasten your reappearance,
وَسَهَّلَ مَخْرَجَكَ
wa sahhala makhrajaka
make easy your advent,
وَقَرَّبَ زَمَانَكَ
wa qarraba zamanaka
make nearer the time of your coming,
وَكَثَّرَ انْصَارَكَ وَاعْوَانَكَ
wa kaththara ansaraka wa a`wanaka
increase the number of your supporters and backers,
وَانْجَزَ لَكَ مَا وَعَدَكَ
wa anjaza laka ma wa `adaka
and fulfill for you all that which He has promised you.
فَهُوَ اصْدَقُ ٱلْقَائِلِينَ:
fahuwa asdaqu alqa'ilina
He is surely the most truthful of all those who can speak (and He has said):
(وَنُرِيدُ انْ نَمُنَّ عَلَىٰ ٱلَّذِينَ ٱسْتُضْعِفُوا فِي ٱلارْضِ
wa nuridu an namunna `ala alladhina istud`ifu fi al-ardi
“We desired to bestow a favor upon those who were deemed weak in the land,
وَنَجْعَلَهُمْ ائِمَّةً وَنَجْعَلَهُمُ ٱلْوَارِثِينَ)
wa naj`alahum a'immatan wa naj`alahumu alwarithina
make them the Imams, and make them the heirs.”
يَا مَوْلايَ يَا صَاحِبَ ٱلزَّمَانِ
ya mawlaya ya sahiba alzzamani
O my master! O Patron of the Age!
يَا بْنَ رَسُولِ ٱللَّهِ
yabna rasuli allahi
O son of Allah’s Messenger!
حَاجَتِي…
hajati…
My request is...

Mention your need and then go on saying:
فَٱشْفَعْ لِي فِي نَجَاحِهَا
fashfa` li fi najahiha
So, intercede for me so that it will be settled,
فَقَدْ تَوَجَّهْتُ إِلَيْكَ بِحَاجَتِي
faqad tawajjahtu ilayka bihajati
for I am turning my face towards you for settling my request,
لِعِلْمِي انَّ لَكَ عِنْدَ ٱللَّهِ شَفَاعَةً مَقْبُولَةً
li`ilmi anna laka `inda allahi shafa`atan maqbulatan
since I know for sure that you enjoy with Allah admissible word of intercession,
وَمَقَاماً مَحْمُوداً
wa maqaman mahmudan
and praiseworthy standing.
فَبِحَقِّ مَنِ ٱخْتَصَّكُمْ بِامْرِهِ
fabihaqqi man ikhtassakum bi-amrihi
So, I ask you in the name of Him Who granted you (i.e. the Ahl al-Bayt) exclusively the right of representing Him,
وَٱرْتَضَاكُمْ لِسِرِّهِ
wartadakum lisirrihi
and admitted you all to keep His secrets,
وَبِٱلشَّانِ ٱلَّذِي لَكُمْ عِنْدَ ٱللَّهِ بَيْنَكُمْ وَبَيْنَهُ
wa bilshsha'ni alladhi lakum `inda allahi baynakum wa baynahu
and I ask you in the name of the standing that you exclusively enjoy with Allah,
سَلِ ٱللَّهَ تَعَالَىٰ فِي نُجْحِ طَلِبَتِي
sal(i) allaha ta`ala fi nujhi talibati
to ask Allah, the Exalted, to render successful my request,
وَإِجَابَةِ دَعْوَتِي
wa ijabati da`wati
to answer my prayer,
وَكَشْفِ كُرْبَتِي
wa kashfi kurbati
and to relieve my grief.
You may then ask for whatever you want, and it will be settled for you, by Allah’s permission.

Allamah Majlisi (r.a.) narrates from the author of Qabs al-Misbaah who writes, ‘I heard Shaykh Abu Abdillah al-Husain Ibn al-Hasan Ibn Babwayh (r.a.)(Shaykh al-Saduq (a.r.)) at Rayy near tehran in the year 440 A.H. narrate from his uncle Abu Ja’far Muhammad Ibn Ali Ibn Babwayh (r.a.)3, ‘One of my teachers from Qum reported, “I was afflicted with a terrible tragedy which made my condition miserable but I felt uncomfortable to let anybody else know about it from my family or friends.
I slept in this state of grief when I dreamt that a handsome man, well dressed and perfumed. His traits were like some of our teachers from Qum from whom I used to study.
I said to myself, ‘Till when will I endure my hardships and afflictions and not let anyone from my brothers know about it? This man is from my teachers and I should mention my problem to him. Perhaps he may solve it for me.
He initiated the conversation with me saying, ‘Return to your path towards Allah, the High, seek help from Saaheb al-Zaman (a.t.f.s.) and take him as your refuge. For surely, he is the best of helpers and a protection for his believing friends.’
Thereafter, he caught his right hand and said, ‘See him, salute him and ask him to intercede on your behalf from Allah, the High, in the fulfillment of your needs.’
I said, ‘Teach me how I should say it because my grief has made me forget all the Ziyarat and Supplications.
He heaved a deep sigh and said, ‘There is no power or strength but through Allah.’ Then he touched my chest with his hand and remarked, ‘Allah will suffice for you and no evil will befall you. Purify yourself and perform two units of prayers. Then stand up, facing the Qiblah, beneath the sky and say the dua.
Refrences
1 Behaar al-Anwaar, vol. 102, p. 235
Behaar al-Anwaar, vol. 102, p. 246.

Istighatha as recomeded by Ayt Taqi Behjat for an important need

Recite 2 Rakat Salat with Al Hamd & Sura Fath in first & Al Hamd and Sura Ikhlass in second. In Qunoot recite Dua Faraj
اللّهُمّ كُنْ لِوَلِيّكَ الحُجّةِ ابْنِ الحَسَنِ
Allahumma Kum le-waliyyekal Hujjatibnil Hassan
O Allah, be, for Your representative, the Hujjat (proof), son of Al­Hassan,
صَلَوَاتُكَ عَلَيْهِ وَعَلَى آبَائِهِ
Salwaatoka A'layhe wa a'laa Aaabaa-Ehi
Your blessings be on him and his forefathers,
فِي هذِهِ السَّاعَةِ وَفي كُلّ سَاعَةٍ
fee haazehis saa-a'te wa fee kulle saa-a'tin
in this hour and in every hour,
وَلِيّاً وَحَافِظاً
waliyyawn wa haafezawn
a guardian, a protector,
وَقَائِداً وَنَاصِراً
wa qaa-edawn wa naaserawn
a leader, a helper,
وَدَلِيلاً وَعَيْناً
wa daleelawn wa a'ynan
a proof, and an eye.
حَتَّى تُسْكِنَهُ أَرْضَكَ طَوْعاً
hattaa tuskenahu arzaka taw-a'n
until You make him live on the earth, in obedience (to You) وَتُمَتّعَهُ فِيهَا طَوِيلاً.
wa tomatte-a'hu feehaa taweelaa.
& Cause him to live in it for a long time
and recite this...
Allhumma Asaloka be maqami indak..

Then Recite Tasbih Zehra (sa)

Do Tawassul to Imam ajtfs
يَا وَصِيَّ ٱلْحَسَنِ
ya wasiyya alhasani
O successor of al-Hasan!
وَٱلْخَلَفُ ٱلْحُجَّةُ
walkhalafu alhujjatu
O descendant [of the Infallibles] and Argument [of Allah]!
أَيُّهَا ٱلْقَائِمُ ٱلْمُنْتَظَرُ ٱلْمَهْدِيُّ
ayyuha alqa'imu almuntazaru almahdiyyu
O Riser, Awaited, and Well-guided!
يَا بْنَ رَسُولِ ٱللَّهِ
yabna rasuli allahi
O son of Allah’s Messenger!
يَا حُجَّةَ ٱللَّهِ عَلَىٰ خَلْقِهِ
ya hujjata allahi `ala khalqihi
O Allah’s Argument against His creatures!
يَا سَيِّدَنَا وَمَوْلاَنَا
ya sayyidana wa mawlana
O our master and chief!
إِنَّا تَوَجَّهْنَا وَٱسْتَشْفَعْنَا
inna tawajjahana wastashfa`na
we are turning our faces toward you, seeking your intercession
وَتَوَسَّلْنَا بِكَ إِلَىٰ ٱللَّهِ
wa tawassalna bika ila allahi
and your advocacy for us before Allah;
وَقَدَّمْنَاكَ بَيْنَ يَدَيْ حَاجَاتِنَا
wa qaddamnaka bayna yaday hajatina
and we are presenting you [as our intermediary] for the settlement of our needs.
يَا وَجِيهاً عِنْدَ ٱللَّهِ
ya wajihan `inda allahi
O well-esteemed with Allah,
إِشْفَعْ لَنَا عِنْدَ ٱللَّهِ
ishfa` lana `inda allahi
intercede for us before Allah.
Note: In case of a important need it can be done for 14 days or 40 days