question #1 Sahih al-Bukhari 2165, Book 34, Hadith 116 : What ethical guidelines are provided for conducting business transactions in Islam?

Allah’s Messenger (ﷺ) said, “You should not try to cancel the purchases of one another (to get a benefit
thereof), and do not go ahead to meet the caravan (for buying the goods) (but wait) till it reaches the
market.”