4015 - وَ رُوِيَ عَنْ مُحَمَّدِ بْنِ قَيْسٍ قَالَ سَمِعْتُ أَبَا جَعْفَرٍ عَلَيْهِ اَلسَّلاَمُ يَقُولُ : "يَكْرَهُ وَسْقاً مِنْ تَمْرِ اَلْمَدِينَةِ بِوَسْقَيْنِ مِنْ تَمْرِ خَيْبَرَ لِأَنَّ تَمْرَ اَلْمَدِينَةِ أَجْوَدُهُمَا " قَالَ "وَ كَرِهَ أَنْ يُبَاعَ اَلتَّمْرُ بِالرُّطَبِ عَاجِلاً بِمِثْلِ كَيْلِهِ إِلَى أَجَلٍ مِنْ أَجْلِ أَنَّ اَلرُّطَبَ يَيْبَسُ فَيَنْقُصُ مِنْ كَيْلِهِ ".
Hadith.4015 - It is narrated from Muhammad ibn Qays, who said: I heard Abu Ja'far Imam Muhammad ibn Ali Al-Baqir 
say: "It is disliked to exchange one wasq of dates from Medina for two wasqs of dates from Khaybar, because the dates of Medina are of better quality."
Imam also said: "It is disliked to sell dates in exchange for fresh dates, even if measured equally, with a delayed payment, because fresh dates dry out and decrease in volume."
