Sahih Muslim 4274
صحيح مسلم#4274SahihThis hadith is narrated on the authority of Suhail with the same chain of transmitters (with these words):" He should expiate for (breaking) the vow and do that which is better
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: 27:21