Nasai

´Sa'd bin Abi Waqas told us that:` The Messenger of Allah [SAW] said: "Fighting a Muslim is Kufr and defaming him is evildoing."

´It was narrated that 'Abdullah said:` "Defaming a Muslim is evildoing and fighting him is Kufr." (Sahih Mawquf)

´It was narrated from Shu'bah, from Abu Ishaq who said:` "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."

´It was narrated that 'Abdullah said:` "Defaming a Muslim is evildoing and fighting him is Kufr." (Sahih Mawquf)

´It was narrated from 'Abdur-Rahman bin 'Abdullah, from his father, that:` The Messenger of Allah [SAW] said: "Defaming a Muslim is evildoing and fighting him is Kufr."

´It was narrated from Shu'bah who said:` "I said to Hammad: 'I heard Mansur, and Sulaiman, and Zubaid narrating from Abu Wa'il, from 'Abdullah, that the Messenger of Allah [SAW] said: "Defaming a Muslim is evildoing and fighting him is Kufr." - Who are you worried about? Are you worried about Mansur? Are you worried about Zubaid? Are you worried about Sulaiman?' He said: 'No, but I am worried about Abu Wa'il.'"

´It was narrated from Sufyan bin Zubaid, from Abu Wa'il, from 'Abdullah:` "The Messenger of Allah [SAW] said: 'Defaming a Muslim is evildoing and fighting him is Kufr.'" I said to Abu Wa'il: "Did you hear it from 'Abdullah?" He said: "Yes."

´It was narrated that 'Abdullah said:` "The Messenger of Allah [SAW] said: 'Defaming a Muslim is evildoing and fighting him is Kufr.'"

´It was narrated that Abu Wa'il said:` "'Abdullah said: 'Defaming a Muslim is evildoing and fighting him is Kufr.'"

´It was narrated that 'Abdullah said:` "Fighting a believer is Kufr and defaming him is evildoing."