Chapter on Currency Exchange and Its Forms
Man Lā Yaḥḍuruh al-Faqīh|Volume 3|Book 2|Chapter 29
وَ رَوَى اِبْنُ مُسْكَانَ عَنِ اَلْحَلَبِيِّ قَالَ: سَأَلْتُ أَبَا عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ عَنْ رَجُلَيْنِ مِنَ اَلصَّيَارِفَةِ اِبْتَاعَا وَرِقاً بِدَنَانِيرَ فَقَالَ أَحَدُهُمَا لِصَاحِبِهِ اُنْقُدْ عَنِّي وَ هُوَ مُوسِرٌ لَوْ شَاءَ أَنْ يَنْقُدَ نَقَدَ فَيَنْقُدُ عَنْهُ ثُمَّ بَدَا لَهُ أَنْ يَشْتَرِيَ نَصِيبَ صَاحِبِهِ بِرِبْحٍ أَ يَصْلُحُ قَالَ "لاَ بَأْسَ بِهِ".
Ibn Muskan narrated from al-Halabi, who said: I asked Abu Abdullah عليه السلام about two moneychangers who bought silver with dinars. One of them said to his companion, "Pay on my behalf," even though he was capable of paying if he wished. So the companion paid for him. Then later, he decided to buy his companion's share with a profit. I asked: "Is this permissible?" Imam عليه السلام said: "There is no harm in it."
- Ṣaḥīḥ al-Faqīh