Sunan an-Nasa'i 4460
سنن النسائي#4460SahihIt 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
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Muslim
In-book reference: 44:12