Ubaidullah bin Mua'dh عبيد الله بن معاذ بن معاذ بن نصر · Commercial Transactions (Kitab Al-Buyu)

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).

I heard the Messenger of Allah (ﷺ) say: If any of you can become like the man who had a faraq of rice, he should become like him. They (the people) asked: Who is the man who had a faraq of rice with him, Messenger of Allah ? Thereupon he narrated the story of the cave when a hillock fell on them (three persons), each of them said: Mention any best work of yours. The narrator said: The third of…