Hadith Authentication is the process of verifying the reliability and credibility of the sayings and actions of the Prophet Muhammad. Scholars assess the chain of narrators, known as the Isnad, and the content, or Matn, to determine if a hadith is authentic, weak, or fabricated. There are several classifications of hadith, including Sahih (authentic), Hasan (good), and Da'if (weak). The most recognized collections of authentic hadith include those compiled by Al-Bukhari and Muslim. This rigorous evaluation helps ensure that the teachings attributed to the Prophet are accurate and trustworthy.