Firishta's History (Gulshan-i Ibrāhīmī) 23.1.7

23.1.7

Seif-ood-Deen Soory, as before related, was betrayed into the hands of Sooltan Beiram by the inhabitants, and with his vizier suffered an ignominious death. This act of cruelty induced Baha-ood-Deen Sam, the sixth brother, to invade Ghizny, with an army from Feroozkooh and Ghoor; but he died suddenly, of the small-pox. The seventh brother, Alla-ood-Deen Hoossein (entitled the Incendiary), however, took ample vengeance, and destroyed Ghizny. He carried his animosity so far as to destroy every monument of the Ghizny emperors, with the exception of those of Mahmood, Musaood, and Ibraheem; but he defaced all the inscriptions, even of their times, from every public edifice. On returning to Ghoor, he appointed his nephews, Gheias-ood-Deen and Moyiz-ood-Deen Sam, (the sons of Baha-ood-Deen Sam, who had shortly before died of the small-pox,) to the government of a province of Ghoor, called Sunja; but finding the revenues of that province did not support them in the style they wished, they made encroachments on their neighbours. This circumstance having reached the ears of Alla-ood-Deen, he sent a force against them, and seizing them both, confined them in a fort of Joorjistan.