Sahih Bukhari Volume 008, Book 079, Hadith Number 701.
Narated By Abu Huraira: A man came to Allah's Apostle and said, "I am ruined!" The Prophet said to him, "What is the matter?" 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, "No." Then an Ansari man came with an Irq (a big basket full of dates). The Prophet said (to the man), "Take this (basket) and give it in charity." That man said, "To poorer people than we, O Allah's Apostle? By Him Who has sent you with the Truth! There is no house in between the two mountains (of the city of Medina) poorer than we." So the Prophet said (to him), "Go and feed it to your family."