Sayyid Ibn Tawus has narrated that Imam Sadiq (peace be upon him) and Imam al-Kadhim (peace be upon him) instructed that the following supplication is advisably said after each and every obligatory prayer all over the month of Ramadan:
اَللَّهُمَّ ٱرْزُقْنِي حَجَّ بَيْتِكَ ٱلْحَرَامِ
allahumma irzuqni hajja baytika alharami
O Allah, (please) confer upon me with the grace of pilgrimage to Your Holy House
munna `alayya bifakaki raqabati min alnnari fi man tamunnu `alayhi
please, do me a favor by releasing me from the Fire and by including me with those to whom You do this favor,
وَأَدْخِلْنِي ٱلْجَنَّةَ
wa adkhilni aljannata
and allow me to enter Paradise,
بِرَحْمَتِكَ يَا أَرْحَمَ ٱلرَّاحِمِينَ
birahmatika ya arhama alrrahimina
on account of Your mercy. O most Merciful of all those who show mercy!
Dua Allahumma Adhkil 'Ala
اَللَّهُمَّ أَدْخِلْ عَلَىٰ
In ‘al-Misbah’ and in ‘al-Balad al-Amin’, Shaykh al-Kaf`amiy, as well as Shaykh al-Shahid in ‘al-Majmu`ah’, have narrated that the Holy Prophet (peace be upon him and his family) said that one who says the following supplication after each obligatory prayer in Ramadan will have all his sins forgiven up to the Resurrection Day: