(16) باب مَا جَاءَ فِيمَنْ رَمَى أَخَاهُ بِكُفْرٍ
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 (ID)
Reference (ID): Jami` at-Tirmidhi 2637 (ID)
In-book reference (ID): Book 40, Hadith 32 (ID)
English translation (ID): Vol. 5, Book 38, Hadith 2637 (ID)