ما هو مدى صحة حديث الذبابة؟

If a fly falls into the vessel of any of you, he should dip it, for it has been authentically narrated from the Prophet, peace and blessings be upon him, that in one of the fly's wings there is a disease and in the other there is a cure, and the fly protects itself with the wing that contains the disease. Therefore, whoever rejects what has been authentically narrated from the Prophet, peace and blessings be upon him, while knowing its authenticity, has left the fold of Islam. And if he rejects it because it does not conform to experimental sciences or because the mind does not accept it, then he is in grave danger, for knowledge is scarce.