In the time of the Messenger of Allah ﷺ we used to be called brokers, but the Prophet ﷺ came upon us one day, and called us by a better name than that, saying: O company of merchants, unprofitable speech and swearing takes place in business dealings, so mix it with sadaqah (alms). (Using translation from Abū Dāʾūd 3326)
كُنَّا نُسَمَّى عَلَى عَهْدِ رَسُولِ اللهِ ﷺ السَّمَاسِرَةَ فَمَرَّ بِنَا رَسُولُ اللهِ ﷺ فَسَمَّانَا بِاسْمٍ هُوَ أَحْسَنُ مِنْهُ فَقَالَ يَا مَعْشَرَ التُّجَّارِ إِنَّ هَذَا الْبَيْعَ يَحْضُرُهُ اللَّغْوُ وَالْحَلِفُ فَشُوبُوهُ بِالصَّدَقَةِ