2681Sahih MuslimSahihوَحَدَّثَنِيهِ إِسْحَاقُ بْنُ مَنْصُورٍ، أَخْبَرَنَا عُبَيْدُ اللَّهِ بْنُ مُوسَى، عَنْ سُفْيَانَ، بِهَذَا الإِسْنَادِ وَقَالَ صَوْمُ شَهْرَيْنِ .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."Reference: Sahih Muslim 1149 d In-book : Book 13, Hadith 206 USC-MSA web (English) : Book 6, Hadith 2560 (deprecated)