Qais b. Abu Gharaza said :In the time of God's Messenger we used to be called brokers, but God’s Messenger came upon us one day and called us by a better name than that, saying, "Company of merchants, unprofitable speech and swearing have a place in business dealing, so mix it with sadaqa. Abu Dawud, Tirmidhi, Nasa’i and Ibn Majah transmitted it.
Hadith Referenceمشكوة المصابيح / كتاب البيوع / 2798
Hadith Gradingالألبانی:صَحِيح | زبیر علی زئی:صحيح
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «صحيح، رواه أبو داود (3326) و الترمذي (1208 وقال: حسن صحيح) و النسائي (14/7. 15ح 3829) و ابن ماجه (2145)»