In 928 Abu'l-Musafir was invested with the government of Azerbaijan by the caliph after Abu'l-Musafir's uncle Yusuf Ibn Abi'l-Saj was killed. After only one and a half years of rule, however, he was poisoned in Ardabil by one of his slaves. The Sajid dynasty came to an end with his death; he was succeeded as governor by Wasif al-Shirvani.
- Madelung, W. (1975). "The Minor Dynasties of Northern Iran". In Frye, R.N. The Cambridge History of Iran, Volume 4: From the Arab Invasion to the Saljuqs. Cambridge: Cambridge University Press. pp. 198–249. ISBN 978-0-521-20093-6.
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Yusuf Ibn Abi'l-Saj
|Emir of Azerbaijan