Imam Nawawi had a very short life of 44 years, but even during this short period, he wrote a large number of books on various subjects. Nearly every work is a masterpiece and a treasure of knowledge. Hundreds of thousands of people have benefited from these works. Among the prestigious works of Imam Nawawi is the compilation of the ” 40 Hadith ” which is what you have in your hands right now. These selected 40 Hadith comprises the essential fundamental concepts of Islam, which in turn construct the minimum level of required revealed knowledge for every single Muslims.