Wensinck’s Condordance is an essential research tool for those who are interested in Islam’s Tradition (ḥadīth) literature. This body of texts is a major source for Islamic theology and law and forms an important source for historians of early Islam. Offering a word-by-word index of all traditions in the canonical and most authoritative texts of Islam’s Tradition literature, the Concordance is the main key to this far from homogenous but highly important corpus of texts.