Categories of Hadith Categories of Hadith Different categories of hadith (sayings attributed to the Islamic prophet Muhammad) have been used by various scholars. Experts in the Hadith studies generally use two terms - "taqrīr" for tacit approvals, and "khabar" for sayings and acts ascribed to Muhammad. The term taqrīr implies that, in the presence of Muhammad, a believer did something, which Muhammad noticed but did not disapprove or condemn. Thus, the act done by a believer acquired tacit approval from Muhammad. It is commonly acknowledged that a khabar can be true or false. The scholars of the science of hadith criticism hold that
Introduction to the Science of Hadith al-Kattānī. `Āʼishah bint `Abd al-Raḥmān said in the foreword of her edition of the "Introduction": His book about the sciences of hadith is the best known of his works without comparison, to the extent that it is sufficient to say, "the Book of Ibn al-Ṣalāḥ", the intent being understood due to its popularity and stature. With the previous scholars, its subject matter overcame it, thus being referred to as, "the Book of Ibn al-Ṣalāḥ about `Ulūm al-Ḥadīth" or as he referred to it in its opening pages, "the Book of Familiarity with the Types of `Ulūm al-Ḥadīth". It has become