Daraqutni

Muhammad bin Hasan, from his father (Hasan), from his father (Imam Zain al-Abidin, may Allah have mercy on him), from his grandfather (Imam Husayn, may Allah be pleased with him), narrates the statement of Sayyiduna Ali bin Abi Talib, may Allah be pleased with him: A man came to the service of the Prophet Muhammad, peace and blessings be upon him, and said, "O Messenger of Allah! I have been ruined." The Prophet, peace and blessings be upon him, asked, "What has caused your ruin?" He replied, "I had intercourse with my wife during Ramadan (while fasting)." The Prophet, peace and blessings be upon him, asked, "Do you have a slave or a bondwoman?" He replied, "No!" The Prophet, peace and blessings be upon him, said, "Then fast for two consecutive months." He replied, "I do not have the strength to fast." The Prophet, peace and blessings be upon him, said, "Then feed sixty needy people, each needy person one mudd." He replied, "I do not have the means for that." So the Prophet, peace and blessings be upon him, instructed that he be given fifteen sa’ (of food). The Prophet, peace and blessings be upon him, said, "Feed this to sixty needy people." He replied, "By Him who has sent you with the truth! There is no family in the whole city more in need than ours." So the Prophet, peace and blessings be upon him, said, "Go, you and your family eat from it, Allah the Exalted has paid the expiation on your behalf."