It is narrated from Hazrat Abu Qatadah (may Allah be pleased with him) that I heard the Noble Prophet (peace and blessings be upon him) say: "Refrain from taking too many oaths in buying and selling, for although it makes the goods sell, its blessing is removed."
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 22545
Hadith Gradingحکم دارالسلام:حديث صحيح، م: 1607، وهذا إسناد حسن