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Abbas ibn Shith was the king of the Ghurid dynasty. He overthrew his uncle Abu Ali ibn Muhammad in 1035, and ascended the Ghurid throne. During his later reign, the nobles of Ghor requested aid from the Ghaznavid sultan Ibrahim, who marched towards Ghor and deposed Abbas ibn Shith. Abbas was succeeded by his son Muhammad ibn Abbas, who agreed to pay tribute to the Ghaznavids.
References
History of Civilizations of Central Asia, C.E. Bosworth, M.S. Asimov, p. 185.
Sources
C. Edmund, Bosworth (2001). "GHURIDS". Encyclopaedia Iranica, Online Edition. Retrieved 5 January 2014.