On it being disliked to use oaths when selling, even if it true

Riyad as-Salihin (The Meadows of the Righteous)

by Imam Nawawi

318. Chapter: On it being disliked to use oaths when selling, even if it true

1720. Abu Hurayra said, "I heard the Messenger of Allah, may Allah bless him and grant him peace, say, 'Making oaths hastens the sale of goods but eradicates the blessings.'" [Agreed upon]

1721. Abu Qatada reported that he heard the Messenger of Allah, may Allah bless him and grant him peace, say, "Beware of making a lot of oaths in respect of sales. It hastens them and then wipes them out." [Muslim]