Chapter 23: Commercial Transactions (Kitab Al-Buyu)
Narrated Abu Hurairah: I heard Messenger of Allah (ﷺ) say: Swearing produces a ready sale for a commodity but blots out the blessing. The narrator Ibn al-Sarh said: "for earning". He also narrated this tradition from Sa' id b. al-Musayyab on the authority of Abu Hurairah from the Prophet (ﷺ).
Sunan Abi Dawud 3335