حبیب السیر 28: Sultdnu-d daula Arsldn Shah bin Mas'ud.

28

When Arslan Shah became King of Ghaznin, he appointed 'Abdu-l Hamid bin Ahmad to the office of prime minister, and having seized his brothers, threw them into prison. One of his brothers, Bahram Shah, managed to flee away and went to his uncle Sanjar, who at that time ruled in Khurasan on the part of his brother Muhammad bin Malik Shah. Sultan Sanjar hoisted his standard for Ghaznin, in order to help his nephew. On his arrival at Bust, the ruler of Sistan, Abu-l Fazl, joined him with a powerful army. Arslan Shah sent a numerous and powerful army to give battle to the Sultan, which ended in many of the Ghaznivides being slain by the army of Khurasan, and the rest escaping the sword by running away in a shameful manner to Ghaznin.
Arslan Shah, having opened the doors of humility and lowliness, sent his mother, who was the sister of Sultan Sanjar, to him, with 2000 dinars and many valuable presents, and proposed a reconciliation. The Sultan evinced a desire to return, but Bahram Shah, not content with what had passed, prevailed over him to such a degree as to persuade him to set out for Ghaznin. When the victorious army was encamped about one parasang from Ghaznin, Arslan Shah drew up his army in order of battle, for the purpose of opposing the king of Khurasan. His forces consisted of 30,000 cavalry, numerous infantry, and 160 elephants. When the brave heroes on both sides had finished contending with sword and spear, through the prosperity of the courage of Abu-l Fazl, ruler of Sistan, the Ghaznivides were defeated. Sultan Sanjar, having entered Ghaznin on the 8th of Shawwal 510 a.h. (1116-7 a.d.), prevented his victorious troops from pillaging and plundering the city. He remained forty days in Ghaznin, appropriated all the treasures of the descendants of Subuktigin, and gave over the realm to Bahram Shah, he himself hoisting his standard for Khurasan.
When Arslan Shah heard that Sanjar had gone away, he led out a numerous army from the confines of Hindustan, and marched towards Ghaznin. Bahram Shah, unable to oppose him, hastened to Bamiyan, and implored the aid of Sultan Sanjar, who again turned his reins towards Ghaznin. Arslan Shah abandoned the capital of his dominion, and being seized by the troops of Sanjar who went in pursuit of him, was taken before Bahram Shah, who having put him to death in the year 512 A.H. (1118-19), became thus fully established in the Sultanship. Arslan Shah reigned for either three or four years. But God knows everything!