Sahih Muslim 4089
صحيح مسلم#4089SahihUbaidullah b. Abu Yazid heard Ibn 'Abbas (Allah be pleased with them) as saying:Usama b. Zaid reported Allah's Apostle (ﷺ) as saying: There can be an element of interest in credit (when the payment is not equal)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 22:128