حَدَّثَنَا قُتَيْبَةُ عَنْ مَالِکٍ عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ عَنْ ابْنِ عُمَرَ عَنْ النَّبِيِّ صَلَّی اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ أَيُّمَا رَجُلٍ قَالَ لِأَخِيهِ کَافِرٌ فَقَدْ بَائَ بِهِ أَحَدُهُمَا هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ غَرِيبٌ وَمَعْنَی قَوْلِهِ بَائَ يَعْنِي أَقَرَّ
جامع ترمذی · Hadith 2637
Narrated Ibn 'Umar: Ibn 'Umar narrated that the Prophet (ﷺ) said: Whoever says to his brother 'disbeliever' then it will have settled upon one of them. Sahih
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020