This document discusses Hadith, which are sayings and actions of the Prophet Muhammad that represent the Sunnah or traditions of Islam. It explains that Hadith are classified based on their authenticity, from sahih (authentic) to fabricated. The document also outlines the structure of Hadith, including the isnad or chain of narrators, and discusses special types of Hadith like Hadith Qudsi, which are inspired revelations but were not verbatim revelations from Allah like the Quran. It provides an example of a Hadith Qudsi to illustrate the difference between it and the Quran.