قَالَ ع كُلُّ رِبًا أَكَلَهُ النَّاسُ بِجَهَالَةٍ ثُمَّ تَابُوا فَإِنَّهُ يُقْبَلُ مِنْهُمْ إِذَا عُرِفَتْ مِنْهُمُ التَّوْبَةُ[5] وَ قَالَ ع لَوْ أَنَّ رَجُلًا وَرِثَ مِنْ أَبِيهِ مَالًا وَ قَدْ عَلِمَ أَنَّ فِي ذَلِكَ الْمَالِ رِبًا وَ لَكِنْ قَدِ اخْتَلَطَ فِي التِّجَارَةِ بِغَيْرِهِ فَإِنَّهُ لَهُ حَلَالٌ طَيِّبٌ فَلْيَأْكُلْهُ وَ إِنْ عَرَفَ مِنْهُ شَيْئاً
Hadith.3997 - Imam (as) said: "Any usury that people consumed out of ignorance, and then they repented, it will be accepted from them once their repentance is recognized." And Imam (as) said: "If a man inherits wealth from his father and knows that there is usury in that wealth, but it has been mixed with other lawful