Sufyan (may Allah have mercy on him) narrated this hadith with the wording narrated by al-Rabi' (may Allah have mercy on him), and added at its end: "I will fast a day in its place."
Al-Muzani said: I heard al-Shafi'i say: I heard Sufyan in most of his sessions not mention "I will fast a day in its place" in it; then I presented it to him a year before he died, and he answered with "I will fast a day in its place."
The Shaykh said: His narrating this hadith for most of his life without this wording, together with the narration of the group from Talhah bin Yahya, none of whom mentions it (among them Sufyan al-Thawri, Shu'bah bin al-Hajjaj, Abd al-Wahid bin Ziyad, Waki' bin al-Jarrah, Yahya bin Sa'id al-Qattan, Ya'la bin Ubayd and others), indicates that this wording is a mistake, and Allah knows best. It has also been narrated through another route from Aishah without this wording.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8342