مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 2793
Business Transactions
Gentleness in Business Dealings - Section 1
وَعَنْ أَبِي قَتَادَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ «إِيَّاكُمْ وَكَثْرَةَ الْحَلِفِ فِي الْبَيْعِ فَإِنَّهُ يُنَفِّقُ ثُمَّ يَمْحَقُ» . رَوَاهُ مُسلم
Abu Qatada reported God’s Messenger as saying, “Avoid much swearing while transacting business, for it produces a ready sale then blots out the blessing.” Muslim transmitted it.
Mishkat al-Masabih, 2793صَحِيح (الألباني)