Sunan at-Tirmithiy كتاب البيوع باب ما جاء فى كراهية تلقى البيوع
The Prophet, peace and blessings of God be upon him, forbade intercepting sales (before vendors entered the marketplace) (1). Footnotes: (1) To ensure that transactions are carried out at fair prices for both locals and travelers, it is forbidden to meet merchants outside of the city or marketplace and to engage in trade before they have become aware of local market prices. Click on ḥadīth to read more