It is narrated from Sayyiduna Anas (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When Allah Almighty fashioned the form of Adam (in Paradise), He left him for as long as Allah willed. So Iblis began circling around him, and when he saw that he was hollow inside (ajwaf), he understood that this was a creature that would not be able to control itself." This hadith is sahih (authentic) on the condition of Imam Muslim, and it has reached me that he recorded it at the end of the book.