Sayyiduna Samurah bin Jundub (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings of Allah be upon him) forbade selling an animal for another animal on credit. Then Hasan (may Allah have mercy on him) forgot this hadith. And Ja'far (may Allah have mercy on him) did not say that Hasan (may Allah have mercy on him) forgot this hadith.