Sahih al-Bukhari 5192
صحيح البخاري#5192SahihNarrated Abu Huraira:The Prophet (ﷺ) said, "A woman should not fast (optional fasts) except with her husband's permission if he is at home (staying with her)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 67:126