Musannaf Ibn Abi Shayba 34:193

Abu Usama narrated to us, from Jarir ibn Hazim, from Abu al-Nadr: A man asked Muhammad ibn Sirin, "What do you say about sitting with these storytellers (al-qussas)?" He said, "I do not command you to do it, nor do I forbid you from it. Storytelling is a newly invented matter that this creation from the Khawarij invented."