Sahih Muslim 6387
صحيح مسلم#6387SahihAl-Bari' b. 'Azib reported:I heard Allah's Messenger (ﷺ) as saying: Hassan b. Thibit, write satire (against the non-believers) ; Gabriel is with you
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: 44:217