Chapter on Sales
Man Lā Yaḥḍuruh al-Faqīh|Volume 3|Book 2|Chapter 11
وَ رُوِيَ عَنْ دَاوُدَ بْنِ سِرْحَانَ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ قَالَ: كَانَ مَعِي جِرَابَانِ مِنْ مِسْكٍ أَحَدُهُمَا رَطْبٌ وَ اَلْآخَرُ يَابِسٌ فَبَدَأْتُ بِالرَّطْبِ فَبِعْتُهُ ثُمَّ أَخَذْتُ اَلْيَابِسَ أَبِيعُهُ فَإِذَا أَنَا لاَ أُعْطَى بِالْيَابِسِ اَلثَّمَنَ اَلَّذِي يَسْوَى وَ لاَ يَزِيدُونِّي عَلَى ثَمَنِ اَلرَّطْبِ فَسَأَلْتُهُ عَنْ ذَلِكَ أَ يَصْلُحُ لِي أَنْ أُنَدِّيَهُ قَالَ "لاَ إِلاَّ أَنْ تُعْلِمَهُمْ" قَالَ فَنَدَّيْتُهُ ثُمَّ أَعْلَمْتُهُمْ قَالَ "لاَ بَأْسَ بِهِ إِذَا أَعْلَمْتَهُمْ".
It is narrated from Dawood bin Sirhan, from Abu Abdillah عليه السلام, who said: I had two sacks of musk-one was moist, and the other was dry. I started with the moist one and sold it. Then I took the dry one to sell, but I found that I was not offered the price it was worth, and they would not pay me more than the price of the moist musk. So I asked Imam عليه السلام about that, whether it was permissible for me to mix them. Imam عليه السلام said: "No, unless you inform them." He said: "So I mixed them and then informed them." Imam عليه السلام said: "There is no harm in it if you inform them."
- Ṣaḥīḥ al-Faqīh, p. 229