The collection of Forty Hadith by Imam Nawawi has been recognized, accepted, and appreciated by Muslim scholars for the last seven centuries. Its significance lay in the fact that these selected forty Hadith comprise the main essential and fundamental concepts of Islam. And these are the unique Hadith which are the minimum level of knowledge required for every Muslim. Various principles are contained therein such as belief, Muslim ethics, and Fiqh, etc. Thus, it is very important to have a good understanding of these Hadith based on scholarly interpretations. This book provides a simple and practical commentary on the Hadith of Imam Nawawi's collection. It is hoped that this commentary will lead the Muslim to better understand and practice the Hadith in his or her life.