Muwatta Malik #1938
Speech
The Arabic includes the chain of narration (sanad) and the collector's commentary; the English translation shows the Prophet's words only.
حَدَّثَنِي مَالِكٌ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ
" مَنْ قَالَ لأَخِيهِ يَا كَافِرُ . فَقَدْ بَاءَ بِهَا أَحَدُهُمَا " .
Malik related to me from Abdullah ibn Dinar from Abdullah ibn
Umar that the Messenger of Allah, may Allah bless him and grant him
peace, said, "If a man says to his muslim brother, 'O kafir!' it is
true about one of them."
Topics
About Muwatta Malik
This hadith is #1938 from Muwatta Malik, in the Book of Speech.