Sahih Bukhari Volume 008, Book 079, Hadith Number 702.
Narated By Abu Huraira: A man came to the Prophets and said, "I am ruined!" The Prophet said, "What is the matter with you?" He said, "I have done a sexual relation with my wife (while fasting) in Ramadan" The Prophet said to him, "Can you afford to manumit a slave?" He said, "No." The Prophet said, "Can you fast for two successive months?" He said, "No." The Prophet said, "Can you feed sixty poor persons?" He said, "I have nothing." Later on an Irq (big basket) containing dates was given to the Prophet, and the Prophet said (to him), "Take this basket and give it in charity." The man said, "To poorer people than we? Indeed, there is nobody between its (i.e., Medina's) two mountains who is poorer than we." The Prophet then said, "Take it and feed your family with it."