It is narrated from Sayyiduna Abu Musa al-Ash'ari (may Allah be pleased with him) that he said: I heard the Messenger of Allah (peace and blessings be upon him) say: 'Allahumma inni astaghfiruka lima qaddamtu wa ma akhkhartu, wa ma a'lantu wa ma asrartu, antal-Muqaddimu wa antal-Mu'akhkhiru, wa anta 'ala kulli shay'in qadir' (O Allah, I seek Your forgiveness for the sins I committed before and those I committed after, those I committed openly and those I committed in secret. You alone are the One who brings forward and You alone are the One who holds back, and You have power over all things). This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.