It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that a man came to the Noble Prophet (peace and blessings of Allah be upon him) and he had intercourse with his wife during the blessed month of Ramadan. Then the complete hadith was narrated, and at the end, he (the Prophet) said: "So (in expiation for this) observe one fast and seek forgiveness from Allah, the Exalted." Imam Abu Bakr (may Allah have mercy on him) says that this chain of narration is mistaken.