faqih-3969Vol. 3, p. 269-270
قَالَ الصَّادِقُ ع[5] فِي الرَّجُلِ يَبِيعُ الشَّيْءَ فَيَقُولُ الْمُشْتَرِي هُوَ بِكَذَا وَ كَذَا بِأَقَلَّ مِمَّا قَالَ الْبَائِعُ قَالَ الْقَوْلُ قَوْلُ الْبَائِعِ إِذَا كَانَ الشَّيْءُ قَائِماً بِعَيْنِهِ مَعَ يَمِينِهِ[1].
Hadith.3975 - Imam Jafar ibn Muhammad Al-Sadiq (as) said regarding a man who sells something and the buyer claims that it was sold for a lower price than what the seller stated: "The statement of the seller is to be accepted if the item is still present in its original form, along with his oath."