Sahih Muslim 603
صحيح مسلم#603SahihAbu Huraira reported:The Messenger of Allah (ﷺ) said: Trim closely the moustache, and grow beard, and thus act against the fire-worshippers
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: 2:70