Farwa' bin Naufal reported: I asked 'A'isha about the supplication that Allah's Messenger (ﷺ) made. She said that he used to say: "O Allah, I seek refuge in Thee from the evil of what I have done and from the evil of what I have not done."
Hadith ReferenceSahih Muslim / The Book Pertaining to the Remembrance of Allah, Supplication, Repentance and Seeking Forgiveness / Hadith: 2716