Answer
In September 931, Al-Husayn ibn al-Qasim assumed the role of vizier, a high-ranking government official, during the reign of the Fatimid caliph al-Qa'im. Al-Husayn proved to be a capable administrator, contributing to the caliphate's political stability and efficient governance. Born into a prominent family of jurists and officials, Al-Husayn possessed the requisite knowledge and experience to excel in his position.