Sahib is first mentioned as in sources as serving as the ra'is of his native city, Nishapur. In 1035, the Ghaznavid ruler Mas'ud I sent an army under Begtoghdi and Sahib Husain against the Seljuqs, who were stationing near Sarakhs. A battle shortly ensured, which resulted in the withdrawal of most of the Ghaznavid troops under Begtoghdi, while Sahib Husain continued to fight the Seljuqs, but was also defeated and was captured by the Seljuq Chaghri Beg.[1][2][3] Sahib Husain later served as the vizier of the Seljuq ruler Tughril.[4] His period as a vizier was only short; in 1054/5 he was replaced by al-Kunduri as the vizier of Tughril, and nothing is known about him after.
Bosworth, C. E. (1975). "The early Ghaznavids". In Frye, R. N. (ed.). The Cambridge History of Iran, Volume 4: From the Arab Invasion to the Saljuqs. Cambridge: Cambridge University Press. pp. 162–198. ISBN0-521-20093-8.