Sahih al-Bukhari 4624
صحيح البخاري#4624SahihNarrated Aisha:Allah's Messenger (ﷺ) said, "I saw Hell and its different portions were consuming each other and saw `Amr dragging his intestines (in it), and he was the first person to establish the tradition of letting animals loose (for the idols)
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: 65:146