Sahih Bukhari Volume 8, Book 73, Hadith Number 185.

Narated By Abu Huraira : A man came to Allah’s Apostle and said, “O Allah’s Apostle! I am ruined!” The Prophet said, “Waihaka (May Allah be merciful to you) !” The man said, “I have done sexual intercourse with my wife while fasting in Ramadan.” The Prophet said, “Manumit a slave.” The man said, ” I cannot afford that. ” The Prophet said; “Then fast for two successive months.” The man said, ” I have no power to do so.” The Prophet said, “Then feed sixty poor persons.” The man said, “I have nothing (to feed sixty persons). Later a basket full of dates were brought to the Prophet and he said (to the man), “Take it and give it in charity.” The man said, “O Allah’s Apostle! Shall I give it to people other than my family? By Him in Whose Hand my life is, there is nobody poorer than me in the whole city of Medina.” The Prophet smiled till his premolar teeth became visible, and said, “Take it.” Az-Zuhri said (that the Prophet said). “Wailaka.”