 Hadith were not written down by Muhammad's followers immediately after his death but many generations later when they were collected, collated and compiled into a great corpus of Islamic literature.Different collections of hadīth would come to differentiate the different branches of the Islamic faith.There are many modern Muslims (some of whom call themselves Quranists but many are also known as Submitters) who believe that most Hadiths are actually fabrications created in the 8th & 9th century AD, and which are falsely attributed the Prophet Muhammad.