Ibn 'Abbas (Allah be pleased with them) reported Allah's Messenger (ﷺ) as saying:
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.
Reference: Sahih Muslim 1521 In-book : Book 21, Hadith 25 USC-MSA web (English) : Book 10, Hadith 3629 (deprecated)
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