حَدَّثَنَا إِسْمَاعِيلُ، قَالَ: حَدَّثَنَا مَالِكٌ، عَنْ عَبْدِ اللهِ بْنِ دِينَارٍ، عَنْ عَبْدِ اللهِ بْنِ عُمَرَ، أَنَّ رَسُولَ اللهِ صلى الله عليه وسلم قَالَ: أَيُّمَا رَجُلٌ قَالَ لأَخِيهِ: كَافِرٌ، فَقَدْ بَاءَ بِهَا أَحَدُهُمَا.
'Abdullah ibn 'Umar reported that the Messenger of Allah, may Allah bless him and grant him peace, said, "If a man says to his brother, 'You are an unbeliever,' it is true for one or the other of them."
Source: Al-Adab Al-Mufrad — repository translation · Imam Muhammad ibn Ismail al-Bukhari — authenticity/grade metadata requires independent source review · Sunnah.comAudio not available for the selected reciter.
Source: Al-Adab Al-Mufrad — repository arabic · Imam Muhammad ibn Ismail al-Bukhari · Sunnah.com