Man Lā Yaḥḍuruh al-Faqīh

Hadith 632
trade
3749 - وَ رُوِيَ عَنْ إِسْحَاقَ بْنِ عَمَّارٍ قَالَ : قُلْتُ لِأَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ آخُذُ اَلدَّرَاهِمَ مِنَ اَلرَّجُلِ فَأَزِنُهَا ثُمَّ أُفَرِّقُهَا وَ يَفْضُلُ فِي يَدِي مِنْهَا فَضْلٌ قَالَ "أَ لَيْسَ تَحَرَّى اَلْوَفَاءَ" قُلْتُ بَلَى قَالَ "لاَ بَأْسَ".
Hadith.3749 - It is narrated from Ishaq ibn Ammar who said: I said to Abu Abdillah (as), "I receive dirhams from a man, weigh them, then distribute them, and a surplus remains in my hand. What should I do?" Imam (as) said: "Did you not strive to be accurate in your measure?" I said: "Yes." Imam (as) said: "Then there is no harm."
Source: Shaykh Muḥammad b. ʿAlī al-Ṣaduq