The Prophet ﷺ said, "Whoever lies about me deliberately, let him take his seat in the Fire."
حدثنا معتمر عن أبيه قال سمعت
قال النبي ﷺ من كذب علي متعمدا فليتبوأ مقعده من النار
Its isnad is sahih, previously mentioned at 12093.