Sunan Abi Dawud Commercial Transactions (Kitab Al-Buyu) Mua'dh bin Mua'dh bin Nsr معاذ بن معاذ بن نصر Smak bin Hrb bin Aws سماك بن حرب بن أوس Sufyan bin Sa‘id Ath-Thawri سفيان الثوري Suwayd bin Qays al-Tajibi سويد بن قيس التجيبي Ubaidullah bin Mua'dh عبيد الله بن معاذ بن معاذ بن نصر Sahih 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). https://parallelquran.com/hadith/sunan-abi-dawud-3335/