Hadith is one of the primary sources of Islamic teachings. Broadly speaking, it encompasses two key aspects: the sanad aspect and the matan aspect. Concerning the sanad aspect, the evolution of hadith scholarship involves numerous narrators, each representing a unique set of personal qualities when compared to one another. This study delves into the classification of hadith based on the authenticity of the sanad (chain of narrators) and the matan (content), emphasizing the critical role of the sanad in evaluating a hadith's authenticity. This study used library research to investigate the historical context of hadith transmission, including challenges like political turmoil and the fabrication of hadith for political purposes, is discussed. Assessing the justice of companions and non-companion narrators should not be done through a strict theological lens but rather within a broader framework that considers historical facts. There is diversity in the approach of hadith scholars when evaluating narrators, with some adopting stringent criteria while others have a more lenient perspective. This diversity can lead to varying judgments on the same narrators. The study essentially emphasizes the intricacy and depth of the science of hadith, highlighting the need for a careful and thorough evaluation of narrators' reliability and authenticity in the context of Islamic doctrines.