A hadith from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) has already passed: The Prophet (peace and blessings be upon him) forbade certain things, and among them he mentioned that the Prophet (peace and blessings be upon him) forbade selling a deferred payment for an early payment. The narrator explained: Selling a deferred payment for an early payment means that a man owes a thousand dirhams, and then he says: "I will give you five hundred early, and you let go of the rest." He mentioned this. The chain of this report contains a narrator, Musa bin Ubaydah al-Rabadhi, and
this report (or this narrator) is also in al-Bazzar.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب البيوع / 6646