(5) باب الْمُنْفِقِ سِلْعَتَهُ بِالْحَلِفِ الْكَاذِبِ
It was narrated from Abu Qatadah Al-Ansari that he heard the Messenger of Allah say:
"Beware of taking oaths a great deal when selling, for it may help you to make a sale but it destroys the blessing."
Reference: Sunan an-Nasa'i 4460
In-book reference: Book 44, Hadith 12
English translation: Vol. 5, Book 44, Hadith 4465