قَالَ رَسُولُ اللَّهِ ص إِنَّ أَخْوَفَ مَا أَخَافُ عَلَى أُمَّتِي مِنْ بَعْدِي هَذِهِ الْمَكَاسِبُ الْحَرَامُ وَ الشَّهْوَةُ الْخَفِيَّةِ وَ الرِّبَا[2].
“Abu ‘Abd Allah (a.s.), has said that the Messenger of Allah, O Allah, grant compensation to Muhammad and his family worthy of their services to Your cause, has said, ‘What I fear most for my followers after me are these unlawful earnings, concealed desire and unlawful interest.’”