Sahih Bukhari Volume 2, Book 23, Hadith Number 378.

Narated By Al-Mughira : I heard the Prophet saying, “Ascribing false things to me is not like ascribing false things to anyone else. Whosoever tells a lie against me intentionally then surely let him occupy his seat in Hell-Fire.” I heard the Prophet saying, “The deceased who is wailed over is tortured for that wailing.”