Riyad as-SalihinChapter 17Hadith 1098
Full Sharh — Riyad as-Salihin 1098
وعن ابن عباس رضي الله عنهما قال: قال رسول الله صلى الله عليه وسلم : “لا تتلقوا الركبان، ولا يبع حاضر لباد" فقال له طاوس: ما قوله: لا بيع حاضر لباد؟ قال: لا يكون له سمسارًا. ((متفق عليه)).
English Translation
Ibn 'Abbas (May Allah be pleased with them) said:: The Messenger of Allah (ﷺ) said, "The caravans carrying merchandise should not be met on the way to purchase from them; a man in the city should not sell for a man of the desert."Tawus asked him (Ibn 'Abbas): "What do these words really imply?" He said: "He should not work as an agent on his behalf.".
Source
Riyad as-Salihin(رياض الصالحين)
The Book of the Prohibited actions
Hadith Number
1098