Sahih Adab al-Mufrad

Sayyiduna Abu Musa (may Allah be pleased with him) narrates from the Prophet (peace and blessings of Allah be upon him) that he used to supplicate: «رب (اللهم) اغفر لي خطأي كله، وإسرافي فى أمري كله، وما أنت أعلم به مني، اللهم اغفر لي خطأي كله، وعمدي وجهلي وهزلي، وكل ذلك عندي اللهم اغفر لي ما قدمت وما أخرت، وما أسررت وما أعلنت، أنت المقدم وأنت المؤخر، وأنت على كل شيء قدير» "O my Lord! (And in another narration: O Allah!) Forgive all my mistakes, forgive all my excesses in my affairs, and (forgive all those errors) which You know better than I do. O Allah! Forgive all my sins, those I committed deliberately, those I committed out of ignorance, those I committed in jest—all of these are from me. O Allah! Forgive me for what I did earlier and what I did later, what I did secretly and what I did openly. You are the One Who brings forward and You are the One Who delays, and You have power over all things."