 After Uthman ibn Sa’id, his son Muhammad ibn Uthman Umari was appointed the deputy of him.After the death of Muhammad ibn Uthman, Abu’l Qasim Husayn ibn Ruh Nawbakhti was the special
deputy, and after his death Ali ibn Muhammad Simmari was chosen for this
task.A few days before the death of Ali ibn Muhammad Simmari in 939 an order was issued by Mahdi stating that in six days Ali ibn Muhammad Simmari would die.