Despite his emphasis on raja, the hope for Jannah and for Allah's forgiveness, he was renowned for his perseverance in worship and his great scrupulousness in matters of religion. A disciple of Ibn Karram, he left his native town of Rey and resided for a time in Balkh, afterwards proceeding to Nishapur where he died in 871 at the age of forty one.
Abu Zakariya  Yahya ibn Mu'adh al-Razi (830–871 CE) was a Muslim Sufi who taught in Central Asia. One of the first to teach Sufism in masajid, he left a number of books and sayings.