they used to buy foold from the riders at the time of the Messenger of Allah and he forbade them to sell it in the place where they had bought it until they moved it to the food market. (Using translation from Nasāʾī 4607)
أَنَّهُمْ كَانُوا يَتَبَايَعُونَ الطَّعَامَ عَلَى عَهْدِ رَسُولِ اللهِ ﷺ مِنَ الرُّكْبَانِ فَنَهَاهُمْ أَنْ يَبِيعُوهُ فِي مَكَانِهِمُ الَّذِي ابْتَاعُوا فِيهِ حَتَّى يَبْلُغُوا إِلَى سُوقِ الطَّعَامِ