It was narrated that Farwah bin Nawfal said:

"I asked the Mother of the Believers 'Aishah about what the Messenger of Allah ﷺ used to say in his supplication. She said: 'He used to say: A'udhu bika min sharri ma 'amiltu wa min sharri ma lam a'mal ba'd (I seek refuge with You from the evil of what I have done and the evil of what I have not done yet.)'"

أَخْبَرَنِي مُحَمَّدُ بْنُ قُدَامَةَ، عَنْ جَرِيرٍ، عَنْ مَنْصُورٍ، عَنْ هِلاَلِ بْنِ يِسَافٍ، عَنْ فَرْوَةَ بْنِ نَوْفَلٍ، قَالَ سَأَلْتُ أُمَّ الْمُؤْمِنِينَ عَائِشَةَ عَمَّا كَانَ رَسُولُ اللَّهِ ﷺ يَدْعُو قَالَتْ كَانَ يَقُولُ " أَعُوذُ بِكَ مِنْ شَرِّ مَا عَمِلْتُ وَمِنْ شَرِّ مَا لَمْ أَعْمَلْ " .