حَدَّثَنَا عَمْرُو بْنُ خَالِدٍ قَالَ‏:‏ حَدَّثَنِي اللَّيْثُ، عَنْ يَحْيَى بْنِ سَعِيدٍ عَنْ مُحَمَّدِ بْنِ يَحْيَى بْنِ حِبَّانَ، عَنْ لُؤْلُؤَةَ، عَنْ أَبِي صِرْمَةَ قَالَ‏:‏ كَانَ رَسُولُ اللهِ صلى الله عليه وسلم يَقُولُ‏:‏ اللَّهُمَّ إِنِّي أَسْأَلُكَ غِنَايَ وَغِنَى مَوْلايَ‏.‏
Translation

Abu Hurayra reported that the Prophet, may Allah bless him and grant him peace, said, "The firmest supplication is to say, 'O Allah, you are my Lord and I am Your slave. I have wronged myself and I admit my wrong action. Only You forgive wrong actions, Lord, forgive me.'"