"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."'
Sunan an-Nasa'i Book 21, Hadith 118
← Previous Hadith "I came to Al-Madinah and sat with 'Umar bin Al-Khattab. A funeral passed by and the deceased was praised, and 'Umar said: 'It is granted.' Then another passed by and the deceased was praised, and 'Umar Said: 'It is granted.' Then a third passed by, and the deceased was criticized, and 'Umar said: 'It is granted.' I said: What is granted, O commander of the believers?' He said: 'I said what the Messenger of Allah said: Any Muslim for whom four people bear witness and say good things, Allah will admit him to Paradise.' We said: 'Or three?' He said: 'Or three.' We said: 'Or two?' He said: 'Or two."'

Sunan an-Nasa'i Book 21, Hadith 117 Next Hadith → "The Messenger of Allah said: 'Do not verbally abuse the dead, for they have reached the consequences of what they did."'

Sunan an-Nasa'i Book 21, Hadith 119