Sahih Muslim 4235
صحيح مسلم#4235SahihIbn Abbas reported that Sa'd b. Ubida asked Allah's Messenger (ﷺ) for a decision about a vow taken by his mother who had died before fulfilling it. Allah's Messenger (ﷺ) said:Fulfil it on her behalf
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 26:1