"Defaming a Muslim is evildoing and fighting him is Kufr." (Sahih Mawquf)
Sunan an-Nasa'i Book 37, Hadith 140
← Previous Hadith The Messenger of Allah said: "Fighting a Muslim is Kufr and defaming him is evildoing."

Sunan an-Nasa'i Book 37, Hadith 139 Next Hadith → "I heard Abu Al-Ahwas (narrate) that 'Abdullah said: 'Defaming a Muslim is evildoing and fighting him is Kufr.'" So Aban said to him: "O Abu Ishaq! You heard it only from Abu Al-Ahwas?" He said: "Rather, I heard it from Al-Aswad and Hubairah."

Sunan an-Nasa'i Book 37, Hadith 141