The Messenger of Allah ﷺ said, "The delay of a wealthy person in repaying a debt is an injustice, and if one of you has his debt transferred to a solvent person, he should accept the transfer."
حدثنا إسمعيل بن توبة حدثنا هشيم عن يونس بن عبيد عن نافع
قال رسول الله ﷺ مطل الغني ظلم وإذا أحلت على مليء فاتبعه
[Sahih] Ahmad narrated it, 2/71, from the hadith of Hushaym, "Yunus bin Ubayd narrated to us," at length, but its defect is that Yunus never heard anything from Nafi, so the chain is disconnected as Busiri said. However, it has sahih corroborating narrations, and through them the hadith is established as sahih.