The Messenger of Allah ﷺ said, "There is no riba except in deferred transactions."
أخبرنا عمرو بن علي قال حدثنا سفيان عن عبيد الله بن أبي يزيد سمع ابن عباس يقول
أن رسول الله ﷺ قال لا ربا إلا في النسيئة
No references are available.
Narrated by Muslim, in the chapter on Musaqah, section on selling food like for like, hadith no. 102/1596, from the hadith of Sufyan bin Uyayna, and by Bukhari through another route (see the hadith that follows), from the hadith of Abdullah bin Abbas, with the same wording. It is also found in Kubra, hadith no. 6172.