(51) باب النَّهْىِ عَنْ ذِكْرِ الْهَلْكَى، إِلاَّ بِخَيْرٍ
It was narrated that 'Aishah said:
"Something bad was said in the presence of the Prophet about a person who had died. He said: 'Do not say anything but good about your dead."'
Reference: Sunan an-Nasa'i 1935
In-book reference: Book 21, Hadith 119
English translation: Vol. 3, Book 21, Hadith 1937