Sayyiduna Qays bin Abi Gharazah (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) came to us while we were buying and selling at al-Aqiq, and we used to be called brokers, and he (peace and blessings be upon him) gave us a better name than the one we had given ourselves, and said: "O company of traders, oaths and lying get mixed into this buying and selling, so mix it with some charity."
Hadith Referenceالمعجم الكبير للطبراني / باب القاف / 16005