١٢- أَحْمَدُ بْنُ مُحَمَّدٍ عَنِ ابْنِ فَضَّالٍ عَنْ أَبِي جَمِيلَةَ عَنْ سَعْدِ بْنِ طَرِيفٍ عَنْ أَبِي جَعْفَرٍ (عَلَيْهِ السَّلام) قَالَ أَخْبَثُ الْمَكَاسِبِ كَسْبُ الرِّبَا. 
12. Ahmad ibn Muhammad from has narrated from ibn Faddal from abu Jamilah from Sa‘d ibn Tarif who has said the following: “Abu Ja’far , has said, ‘The filthiest earning is earning by means of Riba , . ,,, 