Hadith of Umar's ban on hadith decision of Muhammad was rescinded later in his ministry. During Umar's reign as Caliph, hadith were in fact being recorded. On the other hand, some sources dispute this account, and claim that it was Umar himself who was the first person to ban hadith collection - a view also upheld by Shias. Certainly during his rule Umar strictly followed the policy of banning the hadith and he prohibited reporting and transmission of hadith altogether. Whenever he sent a group to a city, he would prohibit them from narrating hadith. This ban continued through the caliphate of the Rashidun caliphs into
Introduction to the Science of Hadith clarify that term and not necessarily establish it. He also distinguished his book by responding to the positions of other scholars in a detailed manner. Ibn al-Ṣalāḥ mentioned in his introduction to the "Introduction" 65 chapters, each specific to a particular type or term of hadith terminology before saying that an even larger number was conceivable. He began by discussing "ṣaḥīḥ" (authentic) as the first category, and then "ḥasan" (good) as the second, "ḍa`īf" (weak) the third, "musnad" (supported) the fourth and so on. Ibn Jamāʻah, in his abridgement, divided these terms into four different categories according to subject (and