Jami` at-Tirmidhi 1200

Abu Salamah and Muhammad bin Abdur-Rahman (bin Thawban) narrated that :Salman bin Sakhr Al-Ansari - from Banu Bayadah - said that his wife was like the back of his mother to him until Ramadan passed. After half of Ramadan had passed he had intercourse with his wife during the night. So he went to the Messenger of Allah to mention that to him. The Messenger of Allah said to him: "Free a slave." He said: "I don't have one." So he said: "Then fast two consecutive months." He said: "I am unable." He said: "Feed sixty needy people." He said: "I can not." So the Messenger of Allah said to Farwah bin Amr: "Give him that Araq - and it is a large basket that holds fifteen or sixteen Sa - to feed sixty needy people