If he dies before he repents...

If he dies before he repents, he would have died having permitted what Allah -azwj had Prohibited.’ وَ قَالَ ص مَنْ كَظَمَ غَيْظاً وَ هُوَ قَادِرٌ عَلَى إِنْفَاذِهِ وَ حَلُمَ عَنْهُ أَعْطَاهُ اللَّهُ أَجْرَ شَهِيدٍ أَلَا وَ مَنْ تَطَوَّلَ عَلَى أَخِيهِ فِي غِيبَةٍ سَمِعَهَا فِيهِ فِي مَجْلِسٍ فَرَدَّهَا عَنْهُ رَدَّ اللَّهُ مِنْهُ أَلْفَ بَابٍ مِنَ السُّوءِ فِي الدُّنْيَا وَ الْآخِرَةِ فَإِنْ هُوَ لَمْ يَرُدَّهَا وَ هُوَ قَادِرٌ عَلَى رَدِّهَا كَانَ عَلَيْهِ كَوِزْرِ مَنِ اغْتَابَهُ سَبْعِينَ مَرَّةً ‘And he -saww said: ‘One who swallows anger while he is able upon implementing it and forbears from it, Allah -azwj will Give him Recompense of a martyr; and the one who graces upon his brother regarding a backbite he had heard regarding him, so he repels it from him, Allah -azwj will Repel from him a thousand doors of evil in the world and the Hereafter.

But if he does not repel it while he is able upon repelling it, upon him would be like a burden (of sins) of the one who had backbitten him, seventy times.’’ [16] فقه الرضا عليه السلام‏ اجْتَنِبُوا الْغِيبَةَ غِيبَةَ الْمُؤْمِنِ وَ احْذَرُوا النَّمِيمَةَ فَإِنَّهُمَا يُفَطِّرَانِ الصَّائِمَ وَ لَا غِيبَةَ لِلْفَاجِرِ وَ شَارِبِ الْخَمْرِ وَ اللَّاعِبِ بِالشِّطْرَنْجِ وَ الْقِمَارِ (The book) ‘Fiqh Al-Reza -asws ,’ may the greetings be upon him -asws : ‘Shun the backbiting, backbiting the Momin, and be cautious of the gossiping , for these two break the fast (of the fasting one), and there is no backbiting of the immoral, and drinker of the wine, and the chess player, and the gambler.’ [17] The snooping محمد بن يحيى، عن محمدبن أحمد، عن محمد بن عيسى، عن يوسف بن عقيل عن محمد بن قيس، عن أبي جعفر عليه السلام قال: محرمة الجنه على القتاتين المشائين بالنميمة.