Musannaf Ibn Abi Shaybah 31373 — What the Prophet (peace and blessings)

Ali bin Rabi'ah said: The Commander of the Believers seated me behind him on his mount and then set off towards the side of al-Harrah. He then raised his head towards the sky and recited this supplication: "Forgive my sins, for none other than You can forgive sins." He then turned towards me and laughed. I said: "O Commander of the Believers, you sought forgiveness from your Lord, and then why did you turn towards me and laugh?" He said: The Messenger of Allah (peace and blessings be upon him) seated me behind him on his mount and then set off with me towards the side of al-Harrah. He likewise raised his head towards the sky and made this supplication: "O Allah, forgive my sins, for none other than You can forgive sins." He (peace and blessings be upon him) then turned towards me and laughed. I said: "O Messenger of Allah (peace and blessings be upon him), you sought forgiveness from your Lord, and then why did you turn towards me and laugh?" He (peace and blessings be upon him) said: "I laughed because of my Lord's laughter, for Allah marvels at His servant, that he knows that none other than Allah can forgive."