444
Musnad AhmedSa"eed bin al-Musayyab said. I heard ‘Uthman (رضي الله عنه) 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 (ﷺ) 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."
Reference: Musnad Ahmad 444
Arabic/English book : Book 4, Hadith 444
Arabic/English book : Book 4, Hadith 444