 Religious achievements included completion of the canonical collections of Hadith of Sahih Bukhari and others.Islam recognized to a certain extent the validity of the Abrahamic religions, the Quran identifying Jews, Christians, Zoroastrians, and "Sabi'un" or "baptists" (usually taken as a reference to the Mandeans and related Mesopotamian groups) as "people of the book".Toward the beginning of the high Middle Ages, the doctrines of the Sunni and Shia, two major denominations of Islam, solidified and the divisions of the world theologically would form.