The townsman should not sell for a man from the desert, leave the people alone, Allah will give them provision from one another. Yahya reported it with a slight change of words.
قَالَ رَسُولُ اللَّهِ ﷺ لاَ يَبِعْ حَاضِرٌ لِبَادٍ دَعُوا النَّاسَ يَرْزُقِ اللَّهُ بَعْضَهُمْ مِنْ بَعْضٍ غَيْرَ أَنَّ فِي رِوَايَةِ يَحْيَى يُرْزَقُ