Sahih Muslim Book 10, Hadith Number 3633.
Chapter : It is forbidden for the townsman to sell on behalf of the man of the desert.
Anas b. Malik (Allah be pleased with him) said: We were forbidden that a townsman should sell for a man of the desert.
Chapter : It is forbidden for the townsman to sell on behalf of the man of the desert.
Anas b. Malik (Allah be pleased with him) said: We were forbidden that a townsman should sell for a man of the desert.