The Messenger of Allah ﷺ forbade a town-dweller from selling on behalf of a desert-dweller.I asked, "What does it mean for a town-dweller to sell on behalf of a desert-dweller?"He replied, "That he should not act as a broker for him."
حدثنا محمد بن عبيد حدثنا محمد بن ثور عن معمر عن ابن طاوس عن أبيه
نهى رسول الله ﷺ أن يبيع حاضر لباد فقلت ما يبيع حاضر لباد قال لا يكون له سمسارا
He should not act as a broker for him.Takhrij: Bukhari transmitted it in "Sales," chapter "May a town dweller sell for a desert dweller without payment?" (Hadith 2158), and Muslim transmitted it in "Sales," chapter "Prohibition of a town dweller selling for a desert dweller" (Hadith 1521), from the hadith of Mamar, with this wording.