Sahih Muslim 6068
صحيح مسلم#6068SahihAnas reported that the hair of Allah's Messenger (may. peace be upon him) came upon his shoulders
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: 43:126