Sunan an-Nasa'i 2177
سنن النسائي#2177SahihIt was narrated from Abu Salamah bin 'Abdur-Rahman that he asked Aishah about the fasting of the Messenger of Allah. She said:"The Messenger of Allah used to fast until we said: 'He will not fast.' And he used to fast Shaban, or most of Shaban
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahHasan Sahih
Al-AlbaniHasan Sahih
Zubair Ali ZaiSahih
In-book reference: 22:88