[9] Reasons for the Prohibition of interest عِدَّةٌ مِنْ...
A number of our companions, from Ahmad Bin Abu Abdullah, form Usman Bin Isa, from Sama’at who said, ‘I said to Abu Abdullah -asws , ‘I see that Allah -azwj the Exalted has Mentioned the interest in another Verse and Repeated it’. So he -asws said: ‘Or do you know why that is so?’ I said, ‘No’. He -asws said: ‘Lest the people refrain from doing the good deeds’.
[10] في عيون الأخبار، في باب ما كتب الرّضا- عليه السّلام- إلى محمّد بن سنان، في جواب مسائله في العلل و علّة تحريم الربا: In Uyoon Al-Akhbar in the chapter of what Al-Reza -asws wrote to Muhammad Bin Sinan, in answer to a question of his regarding the regarding the plague and the reason for the Prohibition of the interest: – انّما نهى اللّه لما فيه من فساد الأموال.
‘But rather, Allah -azwj Prohibited it due to what is therein from the corruption of the wealth, because the human being, when he buys the Dirham with two Dirhams, the price of the one Dirham would be two Dirhams, and the price of the other one is false, and the interest occurs, and buying it and clothing upon every state (is Prohibited) upon the buyer and upon the seller (giver of interest and the taker of it).
Therefore, due to this, Allah -azwj the Exalted Prohibited the interest, and selling of the Dirham with two Dirhams, hand to hand. و علّة تحريم الربا بعد البيّنة، لما فيه من الاستخفاف بالحرام المحرّم. و هي كبيرة بعد البيان و تحريم اللّه لها. و لم يكن ذلك منه إلّا استخفافا بالمحرّم الحرم. و الاستخفاف بذلك دخول في الكفر.