Abu'l-Sāj Dēvdād (Arabic: أبو الساج ديوداد, Abū al-Sāj Dīwdād; died 879) was a Sogdian prince, who was of the most prominent emirs, commanders and officials of the Abbasid Caliphate. He was the eponymous ancestor of the Sajid dynasty of Azerbaijan. His father was named Devdasht.
The Sajid dynasty (Persian: ساجیان, romanized: sâjiyân, also known as Banu Saj) was a Muslim dynasty, of Iranian origin, that ruled from 889/890 until 929. The Sajids ruled Azerbaijan and parts of Armenia first from Maragha and Barda and then from Ardabil. The Sajids originated from the Central Asian province of Ushrusana and were of Iranian (Sogdian) descent and culturally Arabised. Muhammad ibn Abi'l-Saj Diwdad the son of Diwdad, the first Sajid ruler of Azerbaijan, was appointed as its ruler in 889 or 890. Muhammad's father Abu'l-Saj Devdad had fought under the Ushrusanan prince Afshin Khaydar during the latter's final campaign against the rebel Babak Khorramdin in Azerbaijan, and later served the caliphs. Toward the end of the tenth century, as the central authority of the Abbasid Caliphate weakened, Muhammad was able to form a virtually independent state. Much of the Sajids' energies were spent in attempting to take control of neighboring Armenia. The dynasty ended with the death of Abu'l-Musafir al-Fath in 929.