كتاب الأمور المنهي عنها
Read the English translation first, with the original Arabic directly underneath.
Anas bin Malik (May Allah be pleased with him) said:
The Messenger of Allah (ﷺ) forbade that a person in the city should make a deal on behalf of a villager on commission even if he is his real brother." <b>[Al-Bukhari and Muslim]</b>
عن أنس رضي الله عنه قال: نهى رسول الله صلى الله عليه وسلم أن يبيع حاضر لباد وإن كان أخاه لأبيه وأمه. ((متفق عليه)).