صَحِيحُ الْبُخَارِيِّ
Sahih al-Bukhari 48
Belief
(What is said regarding) the fear of a believer that his good deeds may be annulled (lost) without his knowledge
حَدَّثَنَا مُحَمَّدُ بْنُ عَرْعَرَةَ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ زُبَيْدٍ، قَالَ سَأَلْتُ أَبَا وَائِلٍ عَنِ الْمُرْجِئَةِ،، فَقَالَ حَدَّثَنِي عَبْدُ اللَّهِ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ سِبَابُ الْمُسْلِمِ فُسُوقٌ، وَقِتَالُهُ كُفْرٌ .
Narrated 'Abdullah: The Prophet (ﷺ) said, "Abusing a Muslim is Fusuq (an evil doing) and killing him is Kufr (disbelief)."
Sahih al-Bukhari, 48Sahihصحيح