Hadith 93

- (إذا قال الرجل لأخيه: يا كافر! فهو كقتله، ولعْنُ المؤمنِ كقتله) .
Sayyiduna Imran bin Husain (may Allah be pleased with him) narrates that the Prophet (peace and blessings of Allah be upon him) said: "When a man says to his brother: 'O disbeliever!' then (the sin of) it is equivalent to killing him, and cursing a believer is also like killing him."
Hadith Reference سلسله احاديث صحيحه / الايمان والتوحيد والدين والقدر / 93