Good Manners and Form (Al-Adab) 
Bukhari :: Book 8 :: Volume 73 :: Hadith 70
Narrated 'Abdullah:
Allah's Apostle said, "Abusing a Muslim is Fusuq (i.e., an evil-doing), and killing him is Kufr (disbelief)."
Good Manners and Form (Al-Adab)
Bukhari :: Book 8 :: Volume 73 :: Hadith 70
Narrated 'Abdullah:
Allah's Apostle said, "Abusing a Muslim is Fusuq (i.e., an evil-doing), and killing him is Kufr (disbelief)."