حبیب السیر 1: Amir Subuktigin.

1

The best historians derive the lineage of all the Sultans of Ghaznin from Ndsiru-d din Subuktigin, who was the slave of Alptigin.
During the period of the prosperity of the princes of the house of Sdmdni, Alptigin raised himself from a low origin to a state of authority, and in the reign of 'Abdu-l Malik bin Nuh he was appointed Governor of Khurasan, but during the reign of Mansiir bin 'Abdu-l Malik, owing to some mistrust which he had formed of that prince, Alptigin left Khurdsdn, and exalted the standard of his desire towards Ghaznin, and conquered that country. According to Hamdu-lla, Alptigin passed there full sixteen years in prosperity, and, when he died, he was succeeded by his son Abu Is'hak, who delivered over all the affairs of the country, both civil and criminal, to Subuktigin, who was distinguished above all the ministers of Alptigin for his bravery and liberality. Abu Is'hak had lived but a short time, when he died. The chief men of Ghaznin saw the signs of greatness and nobility, and the fires of felicity and prosperity in the forehead of Subuktigin, who widely spread out the carpet of justice, and rooted out injury and oppression, and who, by conferring different favours on them, had made friends of the nobles, the soldiers, and the leading men of the State. He several times led his army towards the confines of Hindustan, and carried off much plunder from the infidels. In the year 367 H. he took Bust and Kusdar, and, after these events, according to the request of Sultan Nuh Sdmani, he turned his attention towards Khurasan. Amir Subuktigin died at the city of Balkh, in the month of Sha'ban, 387 H. (A.D. 997), and fourteen of his descendants occupied the throne after him. Historians reckon the sovereignty of the Ghaznivides as beginning with the conquest of Bust, and they calculate that they flourished for 188 years.