Sunan Ibn Majah 2209
سنن ابن ماجه#2209SahihIt was narrated from Abu Qatadah that the Messenger of Allah (ﷺ), said:"Beware of swearing oaths 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:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Zubair Ali ZaiSahih
In-book reference: 12:73