Messenger of Allah ﷺ said, "A buyer should not urge a seller to restore a purchase so as to buy it himself, and do not practice Najsh; and a town dweller should not sell goods of a desert dweller."  

أَنَّهُ سَمِعَ أَبَا هُرَيْرَةَ ؓ يَقُولُ قَالَ رَسُولُ اللَّهِ ﷺ لاَ يَبْتَاعُ الْمَرْءُ عَلَى بَيْعِ أَخِيهِ وَلاَ تَنَاجَشُوا وَلاَ يَبِعْ حَاضِرٌ لِبَادٍ  

We were forbidden that a town dweller should sell goods of a desert dweller.  

أَنْ يَبِيعَ حَاضِرٌ لِبَادٍ