What is the level of authenticity of this Hadith?
Nabi (sallallahu ‘alayhi wa sallam) said: “Do not swear/speak ill of the dead thereby causing harm to the living [i.e the relatives of the deceased].”
Imam Tirmidhi (rahimahullah) and other Muhaddithun have recorded this Hadith on the authority of Sayyiduna Mughirah ibn Shu’bah (radiyallahu ‘anhu).
(Sunan Tirmidhi, Hadith: 1982)
Imam Ibn Hibban (rahimahullah) has declared the Hadith authentic.
(Sahih Ibn Hibban; Al Ihsan, Hadith: 3022)
Also see here.
And Allah Ta’ala Knows best.
Answered by: Moulana Suhail Motala
Approved by: Moulana Muhammad Abasoomar