The History of Shāhjahān (ʿInāyat Khān) 10: Surrender of Bust.

10

From the beginning of the siege, the flames of war and strife raged furiously for 54 days, and many were killed and wounded on both sides; insomuch that during this period close upon 600 of the Kazalbashis, and nearly half that number of Purdil Khan's followers, met their death. On the 14th Muharram, this year, the governor having begged for quarter, after entering into a strict agreement, had an interview with Mihrab Khan. The latter, having broken his engagement, put to death out of the 600 men, who had stood by the governor to the last, several persons, who, being averse to the surrender, had protracted the struggle; and having made that individual himself a prisoner, together with the rest of his adherents, and his family and children, brought them all to the Shah at Kandahar.
In Zamindawar the war was carried on as follows. As soon as Saz Khan Baligh besieged the fort, Saiyid Asadu-lla, and Saiyid Bakar, sons of Saiyid Bayazid Bukhari, who were engaged in its defence, sent him a message, saying that the fort was a dependency of Kandahar, and without reducing the latter, its capture would be of no use; and it would therefore be better to suspend hostilities until the fate of Kandahar was ascertained, so that blood might not be shed fruitlessly. Saz Khan, concurring in the reasonableness of this proposition, refrained from prosecuting siege operations, and having written to inform the Shah of the fact, sat down to await intelligence. A messenger from the Shah at length brought to the Saiyids a letter, detailing the capture of the fortresses of Bust and Kandahar; whereupon they surrendered the fort.