Sahih al-Bukhari 6153
صحيح البخاري#6153SahihNarrated Al-Bara:The Prophet (ﷺ) said to Hassan, "Lampoon them (the pagans) in verse, and 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 al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 78:179