O Allah, I have greatly wronged myself, and no one forgives sins but You. So, grant me forgiveness a...
Reference:Al-Bukhari 8/168, Muslim 4/2078.Hisnul Muslim 57
اللّهُـمَّ إِنِّـي ظَلَـمْتُ نَفْسـي ظُلْمـاً كَثـيراً وَلا يَغْـفِرُ الذُّنـوبَ إِلاّ أَنْت فَاغْـفِر لي مَغْـفِرَةً مِنْ عِنْـدِك وَارْحَمْـني إِنَّكَ أَنْتَ الغَـفورُ الرَّحـيم
Allāhumma ‘innī ẓalamtu nafsī ẓulman kathīran. wa lā yaghfiru-dhdhunūba illā 'anta. faghfir lī maghfiratam’min `indika warḥamnīinnaka 'anta ‘l-Ghafūr ur-Rahīm.
O Allah, I have greatly wronged myself, and no one forgives sins but You. So, grant me forgiveness and have mercy on me. Surely, you are Forgiving, Merciful.