Abu Qatadah (May Allah be pleased with him) said:
I heard the Messenger of Allah (ﷺ) saying, "Beware of excessive swearing in sale, because it may promote trade but this practice will eliminate the blessing."[Muslim]. (PT)
App reference (PT): Book 18, Hadith 211 (PT)
Arabic/English book reference (PT): Book 18, Hadith 1721 (PT)