This hadeeth has come certainly from the Prophet sallallaahu 'alaihi wasallam, and some people of antiquity and now have questioned this hadeeth because of their ignorance. Former Imam al-Khathabi rahimahullah said: "Have discussed this hadith people who have no part at all in this matter, and said: 'How to gather between drugs and diseases within the two flies wings? And how does he know that from himself? ... it is about ignorant people (fools) or fools. For indeed some animals have accumulated in him two contradictory things,