Chapter on Sales
Man Lā Yaḥḍuruh al-Faqīh|Volume 3|Book 2|Chapter 11
وَ رَوَى حَمَّادٌ عَنِ اَلْحَلَبِيِّ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ: أَنَّهُ سُئِلَ عَنِ اَلْجَوْزِ لاَ نَسْتَطِيعُ أَنْ نَعُدَّهُ فَيُكَالُ بِمِكْيَالٍ ثُمَّ يُعَدُّ مَا فِيهِ ثُمَّ يُكَالُ مَا بَقِيَ عَلَى حِسَابِ ذَلِكَ مِنَ اَلْعَدَدِ قَالَ "لاَ بَأْسَ بِهِ".
Hammad narrated from Al-Halabi, from Abu Abdullah عليه السلام: He was asked about walnuts that cannot be counted individually, so they are measured with a container and then counted based on the amount in that container. Afterward, the remaining quantity is measured according to that count. Imam عليه السلام said: "There is no problem with that."
- Ṣaḥīḥ al-Faqīh, p. 227