1- مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ مُحَمَّدِ بْنِ يَحْيَى عَنْ غِيَاثِ بْنِ إِبْرَاهِيمَ عَنْ أَبِي عَبْدِ اللهِ (عَلَيْهِ السَّلام)
قَالَ قَالَ أَمِيرُ الْمُؤْمِنِينَ (صَلَّى اللهُ عَلَيْهِ وَآلِه) لا بَأْسَ بِالسَّلَمِ كَيْلا مَعْلُوماً إِلَى أَجَلٍ مَعْلُومٍ لا يُسْلَمُ إِلَى دِيَاسٍ وَلا إِلَى حَصَادٍ.
1. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Muhammad ibn Yahya from Ghiyath ibn Ibrahim who has said the following:
“Abu ‘ Abd Allah 
, has said that ‘Amir al-Mu’minin has said, ‘Advance payment for a merchandise is not harmful if it is for known measures and appointed time. Advance payment is not made except for threshing and the time of harvest.’”
