Ash'ath bin Abi al-Ash'atha أشعث بن أبي الشعثاء · The Book of Funerals

"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…

"The Messenger of Allah said: 'Do not verbally abuse the dead, for they have reached the consequences of what they did."'