Quran and Hadith are two of the most important sources of Islamic teachings and guidance. They are often studied together in various courses and programs. Here is a brief overview of what they are and how they differ: - Quran is the holy book of Islam, containing the words of Allah as revealed to Prophet Muhammad through the angel Gabriel. Quran is considered the direct, unaltered, and infallible word of God. Quran has 114 chapters (surahs) and over 6,000 verses (ayahs) that cover various topics such as faith, worship, law, morality, history, and science. Quran is written in classical Arabic and has a unique style and structure. Quran is recited and memorized by Muslims in its original language, and has been translated into many other languages. Quran is also the subject of various disciplines of scholarship, such as exegesis (tafsir), recitation (qira'at), and hermeneutics. - Hadith refers to the sayings, actions, and approvals of Prophet Muhammad, as reported by his companions and later scholars. Hadith serves as a secondary source of Islamic teachings after the Quran, and provides guidance on how to implement the Quranic principles in various situations. Hadith has various collections and classifications, depending on the authenticity and reliability of the narrators and the chains of transmission (isnad). Hadith is also the basis of various fields of Islamic sciences, such as jurisprudence (fiqh), theology (kalam), ethics (akhlaq), and history (sirah).