al-Qasim ibn Muhammad القاسم بن محمد بن أبي بكر الصديق · The Book of Oaths and Vows

"At the time of the Messenger of Allah we used to be called Samasir (brokers). The Messenger of Allah came to us when we were selling and called us by a name that was better than that. He said: 'O merchants (Tujjar), this selling involves lies and (false) oaths, so mix some charity with it.'"

"We used to sell in Al-Baqi, and the Messenger of Allah came to us. We used to be called Samasir (brokers) but he said: 'O merchants!' And called us by a name that was better than our name. Then he said: 'This selling involves (false) oaths and lies, so mix some charity with it.'"

"The Prophet came to us when we were in the marketplace and said: 'This marketplace is filled with idle talk and (false) oaths, so mix some charity with it.'"

"I heard Ka'b bin Malik narrating his Hadith about when he stayed behind and did not join the Messenger of Allah on the campaign to Tabuk. He said: 'When I sat down before him I said: "O Messenger of Allah, as part of my repentance I want to give my wealth in charity to Allah and His Messenger." The Messenger of Allah said: "Keep some of your wealth for yourself; that is better for you." I said: "I will keep…