Messenger of Allah ﷺ forbade the selling of the goods of a desert dweller by a town person.
نَهَى رَسُولُ اللَّهِ ﷺ أَنْ يَبِيعَ حَاضِرٌ لِبَادٍ وَبِهِ قَالَ ابْنُ عَبَّاسٍ
The Prophet ﷺ forbade the meeting (of caravans) on the way and the selling of goods by an inhabitant of the town on behalf of a desert dweller.
نَهَى النَّبِيُّ ﷺ عَنِ التَّلَقِّي وَأَنْ يَبِيعَ حَاضِرٌ لِبَادٍ
ذِكْرُ الْبَيَانِ بِأَنَّ الْحَاضِرَ قَدْ زُجِرَ عَنْ أَنْ يَبِيعَ لِلْبَادِي وَإِنْ لَمْ يَكُنْ بِالْمُهَاجِرِ
[Machine] The Messenger of Allah ﷺ prohibited selling a product that is not in the possession of the seller and said, "Do not engage in present transactions."
نَهَى رَسُولُ اللَّهِ ﷺ أَنْ يَبِيعَ حَاضِرٌ لِبَادٍ وَقَالَ «لَا تَلَقُّوا الْبُيُوعَ»
The riders (carrying merchandise) should not be met in the way, and townsman should not sell for a man of the desert. The narrator reported. I said to Ibn 'Abbas: What do these words really imply-" The townsman for the man of the desert"? He said: That he should work as a broker on his behalf. (Using translation from Muslim 1521)
«نَهَى رَسُولُ اللهِ ﷺ أَنْ يُتَلَقَّى الرُّكْبَانُ وَأَنْ يَبِيعَ حَاضِرٌ لِبَادٍ»