Sayf al-Dawla Ṣadaqa ibn Manṣūr ibn Dubays al-Asadī.

He was a cultivated man of letters, open-handed and highly praised, counted among the foremost Arab nobles. His wanderings carried him to distant frontiers; he ranged through Khurāsān, seized large tracts of Iraqi territory, and people trembled at his power. He fought the caliph al-Mustarshid bi-Llāh, then fled from al-Ḥilla to the lord of Mardīn, Najm al-Dīn, contracted a marriage alliance with him, and moved on to Syria, which at the time was under severe pressure from the Franks. He was later returned to Iraq, where a mishap befell him, so he escaped to Sanjar, the ruler of Khurāsān, who at first received him favorably, then—at the caliph’s request—held him for a while before releasing him. He next joined Sultan Masʿūd, who treacherously killed him at Marāgha in Dhu al-Ḥijjah, in the year 29 (529 AH). Allah thus relieved the ummah of him, for he had plundered, spread alarm, and committed grave outrages.

When he fled with only a few intimates, he made for Murri ibn Rabīʿa, emir of the Arab tribes in Syria; they perished in the wilderness from thirst and several of his slaves died. He then reached the encampment of Maktūm ibn Ḥassān, who hastened to the governor of Damascus, Tāj al-Mulūk, informed him of the fugitive, and Tāj al-Mulūk dispatched Khalīl, who brought him to Damascus. There he was detained with honor, then handed over to the atabeg Zangī so that Zangī would release Tāj al-Mulūk’s son, Sunj ibn Tāj al-Mulūk, from captivity. Dubays was a Shīʿī, like his forefathers, and he composed fine poetry.

As for his brother:

360 – Tāj al-Mulūk Sayf al-Dawla Badrān*

He was an accomplished poet. After their father’s death he moved to Egypt, where people welcomed him for a time, but he was later banished to Aleppo. He died one year after Dubays. The career of Dubays and his kinsmen is substantial enough to merit a separate volume.