Chapter on Guarantee
Man Lā Yaḥḍuruh al-Faqīh|Volume 3|Book 1|Chapter 38
وَ رَوَى اَلْبَزَنْطِيُّ عَنْ دَاوُدَ بْنِ سِرْحَانَ قَالَ: سَأَلْتُ أَبَا عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ عَنْ رَجُلٍ كَانَتْ لَهُ عِنْدَ رَجُلٍ دَنَانِيرُ فَأَحَالَ لَهُ عَلَى رَجُلٍ آخَرَ بِدَنَانِيرِهِ فَيَأْخُذُ بِهَا دَرَاهِمَ أَ يَجُوزُ ذَلِكَ قَالَ "نَعَمْ".
Al-Bazanti narrated from Dawood bin Sirhan, who said: I asked Abu Abdullah عليه السلام about a man who had dinars owed to him by another man, and the debtor transferred the payment obligation to a third man in exchange for dirhams instead of dinars. Is this permissible? Imam عليه السلام replied: "Yes, it is permissible."
- Ṣaḥīḥ al-Faqīh, p. 195