It is narrated from Hazrat Abu Qatadah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: Avoid excessive swearing in buying and selling, for although it makes the transaction successful, its blessing is removed.
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 22571
Hadith Gradingحکم دارالسلام:حديث صحيح، م: 1607، وهذا إسناد حسن