أعوذ بالله من الشيطان الرجيم
بسم الله الرحمن الرحيم
Ibn Abi ad-Dunya has reported in Kitaab al-Hawaatif with necessary chains of suthority that Sayyidna Ali RA was taught a dua which, if recited by anyone after every Salah, would bring for him great reward, forgiveness and mercy. That prayer is given below:
Ya man laa yushghiluhu sam’un an sam’in, wa Ya man laa tughlituhul masaa’ilu, wa Ya man laa yab’ramu min il’haahil mulihheena, adhiqnee barda af’wika wa halaawata maghfiratak.
O He whose hearing of one thing does not hamper His hearing of the other,
And O He who never errs in responding to (millions of) requests simultaneously,
And O He who never becomes weary of the plaints made repeatedly by those who make them in prayers, let me, in Your mercy, have a cool taste of Your forgiveness and sweetness of Your pardon. (Qurtubi)
-Maariful Quran: Volume 5, Surah Kahf (18), pg: 643