The Book of Fasting (Kitab Al-Sawm)
Muslim :: Book 6 : Hadith 2463
'A'isha (Allah be pleased with her) reported that a person came to the Messenger of Allah (may peace be upon him) and said: I am burnt, whereupon the Messenger of Allah (may peace be upon him) said: How is it? He (the person) said: I had intercourse with my wife during the day in Ramadan. Upon this (the Holy Prophet) said: Give charity, give charity. He (the person) said: There is nothing with me. He commanded him to sit down, (In the meanwhile) there were brought to him (to the Holy Prophet) two baskets containing eatables, whereupon the Messenger of Allah (may peace be upon him) told him to give them as sadaqa.