Sahih Muslim , Book 6, Hadith 2560 (USC-MSA) ⓘ
Ibn Buraida (Allah be pleased with him) reported on the authority of his father: A woman came to the Messenger of Allah, and the rest of the hadith is the same, but he said:" Fasting of one month."
وَحَدَّثَنَا عَبْدُ بْنُ حُمَيْدٍ، أَخْبَرَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا الثَّوْرِيُّ، عَنْ عَبْدِ اللَّهِ بْنِ عَطَاءٍ، عَنِ ابْنِ بُرَيْدَةَ، عَنْ أَبِيهِ، - رضى الله عنه - قَالَ جَاءَتِ امْرَأَةٌ إِلَى النَّبِيِّ صلى الله عليه وسلم . فَذَكَرَ بِمِثْلِهِ وَقَالَ صَوْمُ شَهْرٍ .
also referenced under: Book 13, Hadith 205 (In-Book) & Hadith 1149 (Reference)
This hadith has been narrated on the authority of Sufyan with the same chain of transmitters in which it is said: " Fasting of two months."
وَحَدَّثَنِيهِ إِسْحَاقُ بْنُ مَنْصُورٍ، أَخْبَرَنَا عُبَيْدُ اللَّهِ بْنُ مُوسَى، عَنْ سُفْيَانَ، بِهَذَا الإِسْنَادِ وَقَالَ صَوْمُ شَهْرَيْنِ .
also referenced under: Book 13, Hadith 206 (In-Book) & Hadith 1149 (Reference)