Al-Kāfi - Volume 5 > Merchandise Offered for Cash as Well as on Credit (Two Conditions in a Transaction)
Hadith #1

1- عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ [عَنِ ابْنِ أَبِي نَجْرَانَ] عَنْ عَاصِمِ بْنِ حُمَيْدٍ عَنْ مُحَمَّدِ بْنِ قَيْسٍ عَنْ أَبِي جَعْفَرٍ (عَلَيْهِ السَّلام) قَالَ قَالَ أَمِيرُ الْمُؤْمِنِينَ (عَلَيْهِ السَّلام) مَنْ بَاعَ سِلْعَةً فَقَالَ إِنَّ ثَمَنَهَا كَذَا وَكَذَا يَداً بِيَدٍ وَثَمَنَهَا كَذَا وَكَذَا نَظِرَةً فَخُذْهَا بِأَيِّ ثَمَنٍ شِئْتَ وَجَعَلَ صَفْقَتَهَا وَاحِدَةً فَلَيْسَ لَهُ إِلا أَقَلُّهُمَا وَإِنْ كَانَتْ نَظِرَةً قَالَ وَقَالَ (عَلَيْهِ السَّلام) مَنْ سَاوَمَ بِثَمَنَيْنِ أَحَدُهُمَا عَاجِلا وَالآخَرُ نَظِرَةً فَلْيُسَمِّ أَحَدَهُمَا قَبْلَ الصَّفْقَةِ.

1. Ali ibn Ibrahim has narrated from his father from ibn abu Najran from ‘Asem ibn Hamid from Muhammad ibn Qays who has said the following: “Abu Ja’far, ‘Alayhi al-Salam, has said that ’Amir al-Mu’minin has said, ’If one sells certain goods and says that its price in a hand in hand deal is so and so and in a deferred payment deal is so and so, so take which ever you like and makes it a package deal, he can only take what costs the least even if it is the deal with the deferred payment.’ He (the Imam) said, ’If one finalizes a deal by the manner of Musawamah (fixed price regardless of capital) of immediate or deferred payment he must specify one of them before the package deal is final.’”