Chapter on Currency Exchange and Its Forms
Man Lā Yaḥḍuruh al-Faqīh|Volume 3|Book 2|Chapter 29
وَ رُوِيَ عَنْ إِسْحَاقَ بْنِ عَمَّارٍ قَالَ: قُلْتُ لِأَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ يَكُونُ لِلرَّجُلِ عِنْدِي مِنَ اَلدَّرَاهِمِ اَلْوَضَحُ فَيَلْقَانِي فَيَقُولُ أَ لَيْسَ لِي عِنْدَكَ كَذَا وَ كَذَا أَلْفَ دِرْهَمٍ وَضَحٍ فَأَقُولُ نَعَمْ فَيَقُولُ حَوِّلْهَا إِلَى دَنَانِيرَ بِهَذَا اَلسِّعْرِ وَ أَثْبِتْهَا لِي عِنْدَكَ فَمَا تَرَى فِي هَذَا قَالَ "إِذَا كُنْتَ قَدِ اِسْتَقْصَيْتَ لَهُ اَلسِّعْرَ يَوْمَئِذٍ فَلاَ بَأْسَ بِذَلِكَ" قَالَ فَقُلْتُ إِنِّي لَمْ أُوَازِنْهُ وَ لَمْ أُنَاقِدْهُ إِنَّمَا كَانَ كَلاَمٌ مِنِّي وَ مِنْهُ فَقَالَ "أَ لَيْسَ اَلدَّرَاهِمُ مِنْ عِنْدِكَ وَ اَلدَّنَانِيرُ مِنْ عِنْدِكَ" قُلْتُ بَلَى قَالَ "لاَ بَأْسَ بِذَلِكَ".
Ishaq ibn Ammar narrated: I said to Abu Abdullah عليه السلام: "A man has some clear silver dirhams with me. He meets me and says, 'Don't I have such and such amount of clear dirhams with you?' I reply, 'Yes.' Then he says, 'Convert them into dinars at this rate and record them for me as dinars.' What do you think about this?" Imam عليه السلام said: "If you had calculated the exchange rate for him on that day, then there is no harm in it." I said: "I did not weigh them or make the exchange in person; it was only a verbal agreement between us." Imam عليه السلام said: "Aren't the dirhams and dinars both with you?" I said: "Yes." Imam عليه السلام said: "Then there is no harm in it."
- Ṣaḥīḥ al-Faqīh, p. 248