Sahih al-Bukhari #48
Sahih (Authentic)
The Prophet (ﷺ) said, "Abusing a Muslim is Fusuq (an evil doing) and killing him is Kufr (disbelief)
Chain of Narration (Isnad)
Narrated 'Abdullah
The Prophet (ﷺ) said, "Abusing a Muslim is Fusuq (an evil doing) and killing him is Kufr (disbelief)
Narrated 'Abdullah