وَ رَوَى حَمَّادٌ عَنِ اَلْحَلَبِيِّ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ: فِي اَلرَّجُلِ يُعْطِي أَقْفِزَةً مِنْ حِنْطَةٍ مَعْلُومَةٍ يَطْحَنُونَ بِالدَّرَاهِمِ فَلَمَّا فَرَغَ اَلطَّحَّانُ مِنْ طَحْنِهِ نَقَدَهُ اَلدَّرَاهِمَ وَ قَفِيزاً مِنْهُ وَ هُوَ شَيْءٌ قَدِ اِصْطَلَحُوا عَلَيْهِ فِيمَا بَيْنَهُمْ قَالَ "لاَ بَأْسَ بِهِ وَ إِنْ لَمْ يَكُنْ سَاعَرَهُ عَلَى ذَلِكَ".
Hammad narrated from al-Halabi, who reported from Abu Abdillah (a.s) regarding a man who gives a specific amount of wheat to a miller to grind for a fee in dirhams. After the milling is completed, the man pays the miller the agreed dirhams along with a portion of the ground wheat, as this is a customary practice among them. Imam (a.s) said: "There is no harm in it, even if they did not previously agree on this arrangement."