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 1157
This hadith is listed as number 2724 in Maktaba Shamila
حَدَّثَنَا أَبُو الرَّبِيعِ الزَّهْرَانِيُّ ، حَدَّثَنَا أَبُو عَوَانَةَ ، عَنْ أَبِي بِشْرٍ ، عَنْ سَعِيدِ بْنِ جُبَيْرٍ ، عَنِ ابْنِ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُمَا ، قَالَ : " مَا صَامَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ شَهْرًا كَامِلًا قَطُّ غَيْرَ رَمَضَانَ ، وَكَانَ يَصُومُ إِذَا صَامَ حَتَّى يَقُولَ الْقَائِلُ : لَا وَاللَّهِ لَا يُفْطِرُ ، وَيُفْطِرُ إِذَا أَفْطَرَ حَتَّى يَقُولَ الْقَائِلُ : لَا وَاللَّهِ لَا يَصُومُ " ،
Ibn Abbas (RA) (Allah be pleased with both of them) reported: The Messenger of Allah (ﷺ) did not fast throughout any month except during Ramadan. And when he observed fast (he fasted so continuously) that one would say that he would not break (them) and when he abandoned, he abandoned (so continuously) that one would say: By Allah, perhaps he would never fast.
