Sahih Muslim 1156
صحيح مسلم#1156Sahihحَدَّثَنَا يَحْيَى بْنُ يَحْيَى، أَخْبَرَنَا يَزِيدُ بْنُ زُرَيْعٍ، عَنْ سَعِيدٍ الْجُرَيْرِيِّ، عَنْ عَبْدِ اللَّهِ، بْنِ شَقِيقٍ قَالَ قُلْتُ لِعَائِشَةَ رضى الله عنها هَلْ كَانَ النَّبِيُّ صلى الله عليه وسلم يَصُومُ شَهْرًا مَعْلُومًا سِوَى رَمَضَانَ قَالَتْ وَاللَّهِ إِنْ صَامَ شَهْرًا مَعْلُومًا سِوَى رَمَضَانَ حَتَّى مَضَى لِوَجْهِهِ وَلاَ أَفْطَرَهُ حَتَّى يُصِيبَ مِنْهُ .
Abdullah b. Shaqiq reported:I said to'A'isha (Allah be pleased with her): Did the Messenger of Allah (ﷺ) fast for a full month besides Ramadan? She said: I do not know of any month in which he fasted throughout, but that of the month of Ramadan and (the month) in which he did not fast at all, till he ran the course of his life
Scholarly Authentication
The label above is the grade most of these scholars gave, each scholar counted once — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. When they judged only its chain of narrators (“Isnaad”), the label says “Sound chain”. Each scholar's own wording:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
Sahih Muslim 1156 is the standard (Abd al-Baqi) number; this narration is #2717 in the MuslimGPT index.
In-book reference: 13:223