اللَّهُمَّ إِنِّي ظَلَمْتُ نَفْسِي ظُلْمًا كَثِيرًا وَلاَ يَغْفِرُ الذُّنُوبَ إِلاَّ أَنْتَ، فَاغْفِرْ لِي مَغْفِرَةً مِنْ عِنْدِكَ، وَارْحَمْنِي إِنَّكَ أَنْتَ الْغَفُورُ الرَّحِيمُ ”.
Allahumma inni Dhalamtu nafsi Dhulman kathiran, Wala yaghfiru dh-dhunuba illa anta, fa ghfir li maghfiratan min `indika, wa r-hamni, innaka anta l-ghafuru r-rahim.
The Translation :
“O Allah! I have done great injustice to myself and none except You forgives sins, so bestow on me a forgiveness from You, and Have Mercy on me, You are Often Forgiving, the Merciful”
The Hadeeth :
Abu Bakr As-Siddiq (May Allah be pleased with him) reported: I requested the Messenger of Allah (sallahu alayhi wa salam) to teach me a supplication which I could recite in my Salah (prayer). Thereupon He said, “Recite: O Allah! I have considerably wronged myself. There is none to forgive the sins but You. So grant me pardon and have mercy on me. You are the Most Forgiving, the Most Compassionate).”’
[Al-Bukhari and Muslim].
A Side Note: It is recommended to recite this du’a in the Salah after Tashahhud and before Taslim. One can also recite it at all other times.
AbdulFattaah bin Uthman