Sahih al-Bukhari 1969
Book 30: Fasting · Hadith 76
Hadith text
Narrated `Aisha:Allah's Messenger (ﷺ) used to fast till one would say that he would never stop fasting, and he would abandon fasting till one would say that he would never fast. I never saw Allah's Messenger (ﷺ) fasting for a whole month except the month of Ramadan, and did not see him fasting in any month more than in the month of Sha'ban
Ayesha (رضی اللہ عنہا) bataati hain: Allah ke Rasool itna roza rakhte ke koi kehta woh kabhi roza rakhna na chhodenge, aur woh itna roza chhodte ke koi kehta woh kabhi roza rakhna hi nahi karenge. Maine Allah ke Rasool ko kabhi poore mahine roza rakhte nahi dekha siwaye Ramadan ke, aur maine unhe kisi doosre mahine se zyada Sha'ban mein roza rakhte dekha.
Sahih al-Bukhari 1969 · Book 30, Hadith 76