Farwa' bin Naufal reported on the authority of 'A'isha that Allah's Messenger (ﷺ) used to supplicate (in these words): "O Allah, I seek refuge in Thee from the evil of what I did and from the evil of what I did not."
Hadith ReferenceSahih Muslim / The Book Pertaining to the Remembrance of Allah, Supplication, Repentance and Seeking Forgiveness / Hadith: 2716