alkafi-9114Vol. 5, p. 252
كَتَبْتُ إِلَى أَبِي الْحَسَنِ الرِّضَا ع أَنَّ لِي عَلَى رَجُلٍ ثَلَاثَةَ آلَافِ دِرْهَمٍ وَ كَانَتْ تِلْكَ الدَّرَاهِمُ تَنْفُقُ بَيْنَ النَّاسِ تِلْكَ الْأَيَّامَ وَ لَيْسَتْ تَنْفُقُ الْيَوْمَ فَلِي عَلَيْهِ تِلْكَ الدَّرَاهِمُ بِأَعْيَانِهَا أَوْ مَا يَنْفُقُ الْيَوْمَ بَيْنَ النَّاسِ قَالَ فَكَتَبَ إِلَيَّ لَكَ أَنْ تَأْخُذَ مِنْهُ مَا يَنْفُقُ بَيْنَ النَّاسِ كَمَا أَعْطَيْتَهُ مَا يَنْفُقُ بَيْنَ النَّاسِ.
“I once wrote to al-Rida’ (a.s.), and asked, ’A man owes to me three thousand dirham which were in circulation at that time among people, but today they are not in circulation among people; if he still owes me the very substance of those dirham or what is currently in circulation today. He (the Imam) wrote to me, ‘You