The Messenger of Allah ﷺ forbade meeting traders on their way to market, forbade a city dweller from selling on behalf of an Arabi, forbade tying up a camel's udders to deceive buyers, forbade inflating prices through false bidding, forbade a man making an offer over his brother's offer, and forbade a woman asking for the divorce of her sister.
أخبرني عبد الله بن محمد بن تميم قال حدثنا حجاج قال حدثني شعبة عن عدي بن ثابت عن أبي حازم
نهى رسول الله ﷺ عن التلقي وأن يبيع مهاجر للأعرابي وعن التصرية والنجش وأن يستام الرجل على سوم أخيه وأن تسأل المرأة طلاق أختها
Reported by Bukhari, "Conditions," chapter "Conditions in Divorce," no. 2727, and Muslim, "Business Transactions," chapter "Prohibition of a Man Selling Over His Brother's Sale and Bidding Over His Bid… etc.," no. 12/1515, from the hadith of Shubah, through the same route. It is also found in Kubra, no. 6082.