16- أَبُو عَلِيٍّ الأشْعَرِيُّ عَنْ مُحَمَّدِ بْنِ عَبْدِ الْجَبَّارِ عَنْ صَفْوَانَ عَنْ إِسْحَاقَ بْنِ عَمَّارٍ قَالَ
سَأَلْتُ أَبَا إِبْرَاهِيمَ (عَلَيْهِ السَّلام) عَنِ الرَّجُلِ يَكُونُ لِي عَلَيْهِ الْمَالُ فَيَقْضِي بَعْضاً دَنَانِيرَ وَبَعْضاً دَرَاهِمَ فَإِذَا جَاءَ يُحَاسِبُنِي لِيُوَفِّيَنِي كَمَا يَكُونُ قَدْ تَغَيَّرَ سِعْرُ الدَّنَانِيرِ أَيَّ السِّعْرَيْنِ أَحْسُبُ لَهُ الَّذِي كَانَ يَوْمَ أَعْطَانِي الدَّنَانِيرَ أَوْ سِعْرَ يَوْمِيَ الَّذِي أُحَاسِبُهُ قَالَ سِعْرَ يَوْمَ أَعْطَاكَ الدَّنَانِيرَ لأنَّكَ حَبَسْتَ مَنْفَعَتَهَا عَنْهُ.
16. Abu Ali al-Ash’ariy has narrated from Muhammad ibn ‘Abd al-Jabbar from Safwan from Ishaq ibn ‘Ammar who has said the following:
“I once asked abu Ibrahim 
, about the case of a man who owed me a certain amount of assets and paid me back a certain amount in dinars and others in dirhams. He came to finalize the account to pay me the difference because of the exchange in rate of dinar. Was it necessary to pay according to the rate in the day he paid me dinars or the day of accounting? He (the Imam) said, ‘He must pay you according to the rate of the day he gave you dinars because you counted the profit from that day . 555
