عَنْ نَافِعٍ عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ رَضِيَ اللَّهُ عَنْهُمَا قَالَ كَانُوا يَتَبَايَعُونَ الطَّعَامَ جُزَافًا أَعْلَى السُّوقِ فَنَهَاهُمْ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ أَنْ يَبِيعُوهُ حَتَّى يَنْقُلُوهُ
It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that people used to buy and sell grain in the upper part of the market without measuring it. The Messenger of Allah (peace and blessings be upon him) forbade selling that grain further without transferring it from there.