٦- الْحُسَيْنُ بْنُ مُحَمَّدٍ عَنْ مُعَلَّى بْنِ مُحَمَّدٍ عَمَّنْ ذَكَرَهُ عَنْ أَبَانٍ عَنْ مُحَمَّدٍ عَنْ أَبِي عَبْدِ اللهِ (عَلَيْهِ السَّلام) قَالَ مَا كَانَ مِنْ طَعَامٍ مُخْتَلِفٍ أَوْ مَتَاعٍ أَوْ شَيْ‏ءٍ مِنَ الأشْيَاءِ يَتَفَاضَلُ فَلا بَأْسَ بِبَيْعِهِ مِثْلَيْنِ بِمِثْلٍ يَداً بِيَدٍ فَأَمَّا نَظِرَةً فَلا تَصْلُحُ.
6. Al-Husayn from Muhammad has narrated from Mu’alla’ ibn Muhammad from those whom he has mentioned from Aban from Muhammad who has said the following: “Abu ‘Abd Allah , has said, ‘In the exchange of foodstuff of different kinds or other things with different quantities is not harmful in a hand in hand transaction but it is not valid on credit.’” 