صحيح مسلم
Sahih Muslim
كتاب الصيام
The Book of Fasting
باب صِيَامِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي غَيْرِ رَمَضَانَ وَاسْتِحْبَابِ أَنْ لاَ يُخْلِيَ شَهْرًا عَنْ صَوْمٍ.
Chapter: The Prophet's Fasts at times other than Ramadan; and it is recommended to ensure that no month is free of fasting
Hadith 1156
This hadith is listed as number 2720 in Maktaba Shamila
وحَدَّثَنَا قُتَيْبَةُ ، حَدَّثَنَا حَمَّادٌ ، عَنْ أَيُّوبَ ، عَنْ عَبْدِ اللَّهِ بْنِ شَقِيقٍ ، قَالَ : سَأَلْتُ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا : بِمِثْلِهِ ، وَلَمْ يَذْكُرْ فِي الْإِسْنَادِ هِشَامًا ، وَلَا مُحَمَّدًا .
A hadith like this has been narrated on the authority of'Abdullah bin Shaqiq but in the chain of transmitters no mention is made of Hisham and Muhammad.
