Al-Kāfi

2. Through the same chain of narrators as the previous one is the following Hadith from al-Hassan ibn Ali al-Kufiy from ‘Ubays ibn Hisham from Aban ibn Taghlib from abu Hamzah in a marfu’ manner’ has said, the following: “Amir al-Mu’minin (a.s.), once stood on the house of ibn abu Mu‘ayt where camel men stayed, and said, ‘O middlemen people, you must reduce swearing; it makes a merchandise easily marketable but destroys the profit.’”