This document is an introduction to Imam Nawawi's compilation of 40 hadith. It provides background on Nawawi and his scholarly lineage. It explains that many previous scholars had also compiled collections of 40 hadith, and that Nawawi aimed to collect the most important hadith that cover the essential aspects of religion and guidance. The introduction outlines the hadith that Nawawi will include and his methodology of focusing on authentic hadith from Bukhari and Muslim. It asserts the importance of being familiar with these hadith for those seeking guidance to Allah.