Narrated 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).
USC-MSA web (English) reference: Vol. 6, Book 60, Hadith 148
Arabic reference: Book 65, Hadith 4624