قُلْتُ لِأَبِي عَبْدِ اللَّهِ ع يَجِيئُنِي الرَّجُلُ فَيَطْلُبُ الْعِينَةَ فَأَشْتَرِي لَهُ الْمَتَاعَ مُرَابَحَةً ثُمَّ أَبِيعُهُ إِيَّاهُ ثُمَّ أَشْتَرِيهِ مِنْهُ مَكَانِي[3] قَالَ فَقَالَ إِذَا كَانَ بِالْخِيَارِ إِنْ شَاءَ بَاعَ وَ إِنْ شَاءَ لَمْ يَبِعْ[4] وَ كُنْتَ أَنْتَ أَيْضاً بِالْخِيَارِ إِنْ شِئْتَ اشْتَرَيْتَ وَ إِنْ شِئْتَ لَمْ تَشْتَرِ فَلَا بَأْسَ قَالَ قُلْتُ فَإِنَّ أَهْلَ الْمَسْجِدِ[5] يَزْعُمُو
“I once said to abu ‘ Abd Allah (a.s.), ‘A man comes to me and asks for ‘Aynah. I then buy for him the merchandise in the manner of Murabahah (capital plus profit) then sell it to him, then buy it from him at the same place. He (the Imam) said, Tf he has the choice to sell if he likes or not to sell and you also have t