Silsilat al-Ahadith al-Sahihah

Abu Malik Ashja'i narrates from his father Sayyiduna Tariq bin Ashyam (may Allah be pleased with him) that a man came to the Prophet Muhammad (peace and blessings be upon him) and said: O Messenger of Allah! When I ask my Lord, what should I say? The Prophet (peace and blessings be upon him) said: "Say like this: O Allah! Forgive me, have mercy on me, grant me well-being, and provide for me." Then the Prophet (peace and blessings be upon him) closed his fingers except for the thumb. (And said:) "These words will gather for you your world and your Hereafter."