The young Egyptian doctor could not believe the Prophet had said it. The Hadith contradicted everything he had learned about disease and standards of hygiene in Cairo’s modern Qasr Al-Ayni Medical School. ‘If a fly lands in your drink, push it all the way under, then throw the fly out and drink. On one of the fly’s wings is disease, on the other is its cure.’ Such were the words of the Prophet as Tawfiq Sidqi found them.

