مسند امام احمد بن حنبل · Hadith 445

Sa'eed bin al-Musayyab said: I heard 'Uthman (RA) delivering a khutbah from the minbar. He said: I used to buy dates from one of the Jewish clans who were called Banu Qainuqa', and sell them at a profit. News of that reached the Messenger of Allah (PBUH) who said: "O 'Uthman, when you buy, take your dues with nothing extra, and when you sell, give (the other party's) dues with nothing less."

Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020