Revilement

Al-Kāfi|Volume 2|Book 1|Chapter 151
8ـ أَبُو عَلِيٍّ الأشْعَرِيُّ عَنْ مُحَمَّدِ بْنِ حَسَّانَ عَنْ مُحَمَّدِ بْنِ عَلِيٍّ عَنْ مُحَمَّدِ بْنِ الْفُضَيْلِ عَنْ أَبِي حَمْزَةَ قَالَ سَمِعْتُ أَبَا عَبْدِ الله (عَلَيهِ السَّلام) يَقُولُ إِذَا قَالَ الرَّجُلُ لأخِيهِ الْمُؤْمِنِ أُفٍّ خَرَجَ مِنْ وَلايَتِهِ وَإِذَا قَالَ أَنْتَ عَدُوِّي كَفَرَ أَحَدُهُمَا وَلا يَقْبَلُ الله مِنْ مُؤْمِنٍ عَمَلاً وَهُوَ مُضْمِرٌ عَلَى أَخِيهِ الْمُؤْمِنِ سُوءاً.
8. Abu Ali al-Ash’ari has narrated from Muhammad ibn Hassan from Muhammad ibn Ali from Muhammad ibn al-Fudayl from abu Hamza who has said the following: “I heard Abu ‘Abdillah عليه السلام saying, ‘When a man says to his believing brother (in belief), ‘Uff (an expression of slight disappointment) he has moved out of his guardianship. If he says, ‘You are my enemy,’ one of them becomes an unbeliever. Allah does not accept the good deeds of any believer while he hides in him evil for his believing brother (in belief).”’
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