Sahih Muslim 2719 a
Abu Musa Ash'ari reported on the authority of his father that Allahs Apostle (ﷺ) used to supplicate in these words:
" O Allah, forgive me my faults, my ignorance, my immoderation in my concerns. And Thou art better aware (of my affairs) than myself. O Allah, grant me forgiveness (of the faults which I committed) seriously or otherwise (and which I committed inadvertently and de- liberately. All these (failings) are in me. O Allah, grant me forgiveness from the fault which I did in haste or deferred, which I committed in privacy or in public and Thou art better aware of (them) than myself. Thou art the First and the Last and over all things Thou art Omnipotent."
حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُعَاذٍ الْعَنْبَرِيُّ، حَدَّثَنَا أَبِي، حَدَّثَنَا شُعْبَةُ، عَنْ أَبِي إِسْحَاقَ،
 عَنْ أَبِي بُرْدَةَ بْنِ أَبِي مُوسَى الأَشْعَرِيِّ، عَنْ أَبِيهِ، عَنِ النَّبِيِّ صلى الله عليه وسلم أَنَّهُ كَانَ
 يَدْعُو بِهَذَا الدُّعَاءِ ‏
"‏ اللَّهُمَّ اغْفِرْ لِي خَطِيئَتِي وَجَهْلِي وَإِسْرَافِي فِي أَمْرِي وَمَا أَنْتَ أَعْلَمُ
 بِهِ مِنِّي اللَّهُمَّ اغْفِرْ لِي جِدِّي وَهَزْلِي وَخَطَئِي وَعَمْدِي وَكُلُّ ذَلِكَ عِنْدِي اللَّهُمَّ اغْفِرْ لِي مَا
 قَدَّمْتُ وَمَا أَخَّرْتُ وَمَا أَسْرَرْتُ وَمَا أَعْلَنْتُ وَمَا أَنْتَ أَعْلَمُ بِهِ مِنِّي أَنْتَ الْمُقَدِّمُ وَأَنْتَ الْمُؤَخِّرُ
 وَأَنْتَ عَلَى كُلِّ شَىْءٍ قَدِيرٌ ‏"‏ ‏.‏