Sunan Ibn Majah 3940
It was narrated from Abu Hurairah that the Prophet ﷺ said:
“Verbally abusing a Muslim is Fusuq (disobedience) and fighting him is Kufr (ungratefulness to Allah).”
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا مُحَمَّدُ بْنُ الْحَسَنِ الأَسَدِيُّ، حَدَّثَنَا أَبُو هِلاَلٍ، عَنِ ابْنِ سِيرِينَ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ ـ ﷺ ـ قَالَ " سِبَابُ الْمُسْلِمِ فُسُوقٌ وَقِتَالُهُ كُفْرٌ " .
Classification
Sahih (Authentic) [Darussalam]
References
Sunan Ibn Majah 3940
Sunan Ibn Majah Vol. 5, Book of Tribulations, Hadith 3940