Musa bin Ubaydah narrated it in the same way. Musa said: Nafi' said: That means selling a debt for a debt.
Abu Ahmad (Ibn Adi) said: This is known as a narration of Musa bin Ubaydah from Nafi'.
The Shaykh (may Allah have mercy on him) said: Ubaydullah bin Musa, Zayd bin al-Hubab and others narrated it from Musa bin Ubaydah, from Abdullah bin Dinar, from Ibn Umar.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 10538