Sahih Muslim 2216
صحيح مسلم#2216SahihIt is narrated on the authority of 'Abd al-Rahman b. Abu Laila that Zaid used to recite four takbirs on our funerals and he recited five takbirs on one funeral. I asked him the reason (for this variation), to which he replied:The Messenger of Allah (ﷺ) recited thus
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: 11:94