Sunan Ibn Majah Book 34, Hadith 13
"I asked 'Aishah about a supplication that the Messenger of Allah (saas) used to say. She said that he used to say: 'Allahumma inni a'udhu bika min sharri ma 'amiltu, wa min sharri ma lam a'mal (O Allah, I seek refuge with You from the evil of that which I have done and the evil of that which I have not done).'"
Prophet (saas) would supplicate with these words: "Allahumma inni a'udhu bika min fitnatin-nari wa 'adhabin-nar, wa min fitnatil-qabri wa 'adhabil-qabr, wa min sharri fitnatil-ghina wa min sharri fitnatil-faqr, wa min sharri fitnatil-masihid-dajjal. Allahumma aghsil khatayaya bima'ith-thalfi wal-barad, wa naqqi qalbi minal-khataya kama naqqaytath-thawbal-abyad minad-danas. Wa ba'id bayni wa bayna khatayaya kama ba'adta baynal-mashriqi wal-maghrib. Allahumma inni a'udhu bika minal-kasali wal-harami wal-ma'thami wal-maghrami (O Allah, I seek refuge with You from the tribulation of the Fire and the torment of the Fire, and from the tribulation of the grave, and from the evil of the tribulation of richness and the evil of the tribulation of poverty, and from the evil of the trial of the False Christ. O Allah! Wash away my sins with the water of snow and hail, and cleanse my heart from sin as a white garment is cleansed from filth, and put a great distance between me and my sins, as great as the distance You have made between the east and the west. O Allah! I seek refuge with You from laziness and old age, and from sins and debt)."
"The Messenger of Allah (saas) used to teach us this supplication just as he would teach us a Surah from the Qur'an: 'Allahumma inni a'udhu bika min 'adhabi jahannam, wa a'udhu bika min 'adhabil-qabr, wa a'udhu bika min fitnatil-masihil-dajjal, wa a'udhu bika min fitnatil-mahya wal-mamat (O Allah, I seek refuge with You from the torment of Hell, and I seek refuge with You from the torment of the grave, and I see refuge with you from the tribulation of False Christ, and I seek refuge with You from the trials of life and death).'"