Sayyiduna Abu Hurayrah (may Allah be pleased with him) said that a man said to the Messenger of Allah (peace and blessings be upon him): I had intercourse with my wife in Ramadan. He asked the Messenger of Allah (peace and blessings be upon him) for a ruling, and he (peace and blessings be upon him) said: "Can you find a slave?" He said: No. He (peace and blessings be upon him) said: "Can you fast two months?" He said: No. He (peace and blessings be upon him) said: "Then feed sixty poor people."
Ibn Bukayr added the word "mutatabi'ayn" (consecutive) in his narration.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8043