it is also called science of hadith, or
science of hadith criticism or hadith criticism. It consists of several religious scholarly disciplines used in the study and evaluation of the Islamic hadith - i.e. the record of the words, actions, and the silent approval of the Islamic prophet, Muhammad, by Muslim scholars. Determining authenticity of hadith is enormously important in Islam because along with the Quran , the Sunnah of the Islamic prophet-his words, actions, and the silent approval-are considered divine revelation ( wahy ), and the record of them (i.e. hadith) provides the basis of Islamic law ( Sharia ).