حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا وَكِيعٌ، وَإِسْحَاقُ بْنُ سُلَيْمَانَ، قَالاَ حَدَّثَنَا مَالِكُ بْنُ أَنَسٍ، عَنْ عَبْدِ اللَّهِ بْنِ يَزِيدَ، مَوْلَى الأَسْوَدِ بْنِ سُفْيَانَ أَنَّ زَيْدًا أَبَا عَيَّاشٍ، - مَوْلًى لِبَنِي زُهْرَةَ - أَخْبَرَهُ أَنَّهُ، سَأَلَ سَعْدَ بْنَ أَبِي وَقَّاصٍ عَنِ اشْتِرَاءِ الْبَيْضَاءِ، بِالسُّلْتِ فَقَالَ لَهُ سَعْدٌ أَيَّتُهُمَا أَفْضَلُ قَالَ الْبَيْضَاءُ . فَنَهَانِي عَنْهُ وَقَالَ إِنِّي سَمِعْتُ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ سُئِلَ عَنِ اشْتِرَاءِ الرُّطَبِ بِالتَّمْرِ فَقَالَ " أَيَنْقُصُ الرُّطَبُ إِذَا يَبِسَ " . قَالُوا نَعَمْ . فَنَهَى عَنْ ذَلِكَ .
It was narrated from 'Abdullah bin Yazid, the freed slave of Al-Aswad bin Sufyan, that : Zaid, Abu 'Ayyash, the freed slave of Bani Zuhrah, told him that he asked Sa'd bin Abu Waqqas about buying wheat with barley. Sa'd said to him: "Which of them is better?" He said: "Wheat." He told him not to do that and said: "I heard the Messenger of Allah (PBUH) being asked about buying fresh dates with dried dates, and he said: 'Do fresh dates decrease in weight when they become dry?' They said: 'Yes.' So he told them not to do that." Translation Not Available
Book Ref: Sunan Ibn Majah Book 12 Hadith 2264
Web Ref: Sunan Ibn Majah Vol 3 Book 12 Hadith 2264