Nafi' narrates from Ibn Umar (may Allah be pleased with them both) that "the Prophet (peace and blessings be upon him) forbade bay' al-kali' bi-l-kali'" (that is, when both the payment of the price and the delivery of the item are on credit).
This Musa is Musa bin Ubaydah al-Rabadhi; in the narration of our shaykh Abu Abdullah he is named Musa bin Uqbah, and that is a mistake.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 10536