It is narrated from Sayyiduna Qays bin Abi Gharazah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) passed by the traders, who at that time were called by a name which he (peace and blessings be upon him) changed, and he (peace and blessings be upon him) said: "O company of traders, idle talk and oaths get mixed into your buying and selling, so mix it with some charity."
Imam al-Tabarani (may Allah have mercy on him) said: These are the words of the narration of Hajjaj.
Hadith Referenceالمعجم الكبير للطبراني / باب القاف / 16003