He was an early eminent scholar amongst the shia community in the investigation of hadith and also Quranic sciences.
Given that Ibn Shahr Ashoub was a traditionist, he traveled to many cities and countries, listening to and collecting Hadith.
[4] According to pakatchi, Ibn Shahr Asoub had many popular masters in hadith such as follow: He left many books but some of them have been published.
[6] The most important books by him could be listed as below: At the same time some other scholars believe that Ibn Shahr Ashoub not only believe in Imam's knowledge to Qhayb but he refers to it by reports from Imam Ali including possessing knowledge of Unseen and prophesy future events such as times of death of various people.
[7] On the other hand, some scholars think that he believed that both Imams and prophets couldn't have any knowledge of the Ghayb (absence) and that of past and future.