Sa'id bin al-Musayyib (may Allah have mercy on him) says that a man came to the Prophet (peace and blessings be upon him) and said: I had intercourse with my wife in the month of Ramadan. He (peace and blessings be upon him) said: "Free a neck (slave)." He said: I do not have one. He (peace and blessings be upon him) said: "Fast two consecutive months." He said: I am not able to. He (peace and blessings be upon him) said: "Give charity to sixty poor people." He said: I cannot find (the means). Then a basket of 15 sa' of dates was brought to the Prophet (peace and blessings be upon him); he (peace and blessings be upon him) gave it to him and said: "Feed sixty poor people." He said: O Messenger of Allah (peace and blessings be upon him)! Between the two edges of the mountain there is no one more needy than my family. He (peace and blessings be upon him) said: "Go and feed your family."
This mursal narration supports the connected (marfu') narrations; but in what Ata al-Khurasani narrates from Sa'id bin al-Musayyib (may Allah have mercy on him) there is doubt in reporting 15 sa' or 20 sa'.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الظهار / 15290