Sunan an-Nasa'i 2183
سنن النسائي#2183SahihIt was narrated that 'Abdullah bin Shaqiq said:""I asked 'Aishah about the fasting of the Messenger of Allah. She said: 'The Messenger of Allah used to fast until we said that he is going to fast (continually), and he used not to fast until we said: he is not going to fast. And he did not fast for a whole month from the time he came to Al-Madinah, apart from Ramadan
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Muslim
In-book reference: 22:94