Du'a for Forgiveness: Prophet's Regular Supplication
الفئة: Forgiveness
رَبِّ اغْفِرْ لِي وَتُبْ عَلَيَّ إِنَّكَ أَنْتَ التَّوَّابُ الرَّحِيمُ
Rabbighfir lee wa tub 'alayya innaka Antat-Tawwaabur-Raheem.
My Lord, forgive me and accept my repentance. Indeed, You are the Accepter of Repentance, the Most Merciful., Muhsin Khan (en)
Sunan Abi Dawud 1516
The Prophet ﷺ used to say this 100 times in a gathering.