Sacred tradition or report. Also called hadith rabbani or hadith ilahi (divine hadith). Refers to a saying (hadith) of the Prophet Muhammad in which the meaning is revealed by God and the phrasing is formulated by the Prophet. Unlike prophetic hadith (hadith nabawi), the chain of transmission is traced back directly to God instead of ending with the Prophet. In contrast to the Quran, which is considered divine revelation in both meaning and wording, the authenticity of sacred hadith varies from one narration to another, and they may not be recited in prayer. They function as extra-Quranic revelation.