Mishkat al-Masabih #1945
Fasting
The Arabic includes the chain of narration (sanad) and the collector's commentary; the English translation shows the Prophet's words only.
وَعَنْ عَبْدِ اللَّهِ بْنِ شَقِيقٍ قَالَ: قُلْتُ لِعَائِشَةَ: أَكَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَصُوم شهرا كُله؟ قَالَ: مَا عَلِمْتُهُ صَامَ شَهْرًا كُلَّهُ إِلَّا رَمَضَانَ وَلَا أَفْطَرَهُ كُلَّهُ حَتَّى يَصُومَ مِنْهُ حَتَّى مضى لسبيله. رَوَاهُ مُسلم
‘Abdallah b. Shaqiq said that when he asked ‘A'isha whether the Prophet used to fast a whole month she replied, "I never knew him to fast a whole month except Ramadan, nor to refrain from fasting some part of every month till he died."
Muslim transmitted it.
Topics
About Mishkat al-Masabih
This hadith is #1945 from Mishkat al-Masabih, in the Book of Fasting.