Man Lā Yaḥḍuruh al-Faqīh

Hadith 669
trade
3786 - وَ رَوَى اِبْنُ أَبِي عُمَيْرٍ عَنِ اَلْحَسَنِ بْنِ عَطِيَّةَ قَالَ : سَأَلْتُ أَبَا عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ قُلْتُ إِنَّا نَشْتَرِي اَلطَّعَامَ مِنَ اَلسُّفُنِ ثُمَّ نَكِيلُهُ فَيَزِيدُ قَالَ "وَ رُبَّمَا نَقَصَ عَلَيْكُمْ" قُلْتُ نَعَمْ قَالَ "فَإِذَا نَقَصَ يَرُدُّونَ عَلَيْكُمْ" قُلْتُ لاَ قَالَ "لاَ بَأْسَ".
Hadith.3786 - Ibn Abi Umayr narrated from Al-Hasan ibn Atiyyah, who said: I asked Abu Abdillah (as): "We buy food from ships, and then we measure it, sometimes finding an excess." Imam (as) said: "And perhaps it might sometimes be less for you?" I said: "Yes." Imam (as) said: "If it is less, do they compensate you?" I said: "No." Imam (as) said: "Then there is no harm."
Source: Shaykh Muḥammad b. ʿAlī al-Ṣaduq