Majma al-Zawaid — Hadith 7829

Abu Salamah and Muhammad bin Abd al-Rahman bin Thawban narrate: Salman bin Sakhr al-Bayadi declared his wife to be like his mother's back for him if he had intercourse with her (that is, his wife would be like his mother's back for him), and that this would remain until Ramadan had passed. When half of Ramadan had passed, the woman became healthy and plump, and one day she pleased him, so he had intercourse with her at night. Then he came to the Prophet (peace and blessings be upon him) and told the Prophet (peace and blessings be upon him) about this. The Prophet (peace and blessings be upon him) said, "Free a slave." He said, "I do not have one." The Prophet (peace and blessings be upon him) said, "Fast two consecutive months." He said, "I am not able to." The Prophet (peace and blessings be upon him) said, "Feed sixty poor people." He said, "I do not have the means for that." Then a basket was brought to the Prophet (peace and blessings be upon him) containing fifteen sa', or perhaps sixteen sa', of dates. The Prophet (peace and blessings be upon him) said, "Take this and give it in charity to sixty poor people." (Allamah al-Haythami says:) I say: Abu Dawud and others also recorded this narration, but it does not contain the words: "if he had intercourse with her."
Tabarani recorded it. This narration is mursal, and its narrators are thiqat (trustworthy).