(52) باب النَّهْىِ عَنْ سَبِّ الأَمْوَاتِ،
It was narrated that 'Aishah said:
"The Messenger of Allah said: 'Do not verbally abuse the dead, for they have reached the consequences of what they did."'
Reference: Sunan an-Nasa'i 1936
In-book reference: Book 21, Hadith 120
English translation: Vol. 3, Book 21, Hadith 1938