It was narrated that Qais bin Abu Gharazah said:"At the time of the Messenger of Allah (ﷺ) we used to be called brokers, but the Messenger of Allah (ﷺ) passed by us and called by a name that was better than that. He said: 'O merchants, selling involves (false) oaths and idle talk, so mix some charity with it."'
حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ نُمَيْرٍ، حَدَّثَنَا أَبُو مُعَاوِيَةَ، عَنِ الأَعْمَشِ، عَنْ شَقِيقٍ، عَنْ قَيْسِ بْنِ أَبِي غَرَزَةَ، قَالَ كُنَّا نُسَمَّى فِي عَهْدِ رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ السَّمَاسِرَةَ فَمَرَّ بِنَا رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ فَسَمَّانَا بِاسْمٍ هُوَ أَحْسَنُ مِنْهُ فَقَالَ " يَا مَعْشَرَ التُّجَّارِ إِنَّ الْبَيْعَ يَحْضُرُهُ الْحَلِفُ وَاللَّغْوُ فَشُوبُوهُ بِالصَّدَقَةِ " .
IbnMaja
The Chapters on Business Transactions • Hadith 2145