Through the same chain, it is narrated from Sayyiduna Samurah (may Allah be pleased with him); he said that the Messenger of Allah (peace and blessings be upon him) used to say: "Do not sell on behalf of the Bedouins in the town (that is, a townsman should not sell in the market on behalf of a Bedouin), even if he is the brother, father or mother of one of you."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 7036