The Messenger of Allah ﷺ said, "Whoever lies about me," I think he said, "deliberately, let him take his seat in the Fire."
حدثنا إسحاق حدثني ليث حدثني ابن شهاب
عن رسول الله ﷺ أنه قال من كذب علي قال حسبته أنه قال متعمدا فليتبوأ مقعده من النار
Its isnad is sahih, mentioned previously at 13122.