Sahih Muslim 2649
صحيح مسلم#2649SahihThis hadith has been narrated from Jarir on the authority of A'mash with the same chain of transmitters and he said (these words with a little bit of variation from the previous hadith):When (fasting) in Ramadan was (made) obligatory, he abandoned it (the practice of observing fast on Ashura)
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: 13:155