Ali reported, I heard the Messenger of Allah ﷺ say, "Lying about me is not like lying about anyone else. Whoever lies about me, let him take his seat in the Fire."
سمعت رسول الله ﷺ يقول: إن كذبا علي ليس ككذب على أحد، فمن كذب علي فليتبوأ مقعده من النار.
Bukhari narrated it in the Book of Funerals (1291), and Muslim in the Introduction (4), from the route of Ali bin Rabia Asadi, from Mughira bin Shuba, who mentioned it.