Sahih al-Bukhari is one of the most authentic collections of hadith, which are the sayings, actions, and approvals of the Prophet Muhammad. Compiled by the Islamic scholar Imam Muhammad ibn Ismail al-Bukhari in the 9th century, it serves as a key source of guidance for Muslims, complementing the Quran in matters of faith, law, and morality. The collection is renowned for its rigorous criteria for authenticity, making it a cornerstone in Islamic jurisprudence and theology.