According to (the book of) Muhaj al-Da`awat, this is the prayer of the Argument of Allah (i.e. Imam al-Mahdi al-Hujjah)by Sayyid Al-Ajal:
إِلٰهِي بِحَقِّ مَنْ نَاجَاكَ
O my God, in the name of all those who have besought you
وَبِحَقِّ مَنْ دَعَاكَ فِي ٱلْبَرِّ وَٱلْبَحْرِ
and in the name of all those who have prayed to you in lands and seas,
صَلِّ عَلَىٰ مُحَمَّدٍ وَآلِهِ
(please do) bless Muhammad and his Household,
وَتَفَضَّلْ عَلَىٰ فُقَرَاءِ ٱلْمُؤْمِنِينَ وَٱلْمُؤْمِنَاتِ
bestow upon the poor among the believing men and women
بٱلْغَنَاءِ وَٱلثَّرْوَةِ
with wealth and fortune,
وَعَلَىٰ مَرْضَىٰ ٱلْمُؤْمِنِينَ وَٱلْمُؤْمِنَاتِ
upon the ailed believing men and women
بِٱلشِّفَاءِ وَٱلصِّحَّةِ
with healing and health,
وَعَلَىٰ احْيَاءِ ٱلْمُؤْمِنِينَ وَٱلْمُؤْمِنَاتِ
upon the living believing men and women
بِٱللُّطْفِ وَٱلْكَرَمِ
with kindness and generosity,
وَعَلىٰ امْوَاتِ ٱلْمُؤْمِنِينَ وَٱلْمُؤْمِنَاتِ
upon the dead believing men and women
بِٱلْمَغْفِرَةِ وَٱلرَّحْمَةِ
with forgiveness and mercy,
وَعَلىٰ غُرَبَاءِ ٱلْمُؤْمِنِينَ وَٱلْمُؤْمِنَاتِ
and upon the emigrant believing men and women
بِٱلرَّدِّ إِلَىٰ اوْطَانِهِمْ سَالِمِينَ غَانِمِينَ
with returning them home peacefully and successfully,
بِمُحَمَّدٍ وَآلِهِ اجْمَعينَ
in the name of Muhammad and the members of his Household.