Firishta's History (Gulshan-i Ibrāhīmī) 56.1.6

56.1.6

In the same year also Ibrahim Sar, the governor of the fort of Asheera, having rebelled, caused the khootba to be read in the name of Baesanghar Mirza, the son of Sooltan Mahmood Mirza, who had succeeded to the throne of Samarkand. Babur marched against him, and besieged Asbeera, which he reduced in the space of forty days, and the rebel was obliged to come forth with a sword suspended round his neck, and a shroud hung over his shoulders. Babur, however, forgave him, and marched first to Khoojund, and from thence to Sharokhia, where he met his maternal uncle, Mahmood Khan, to whom he now became reconciled; in a few days after which, he returned to Indijan. Baesanghar Mirza, king of Samarkand, having possessed himself of Aratiba, one of the provinces belonging to Oomr Sheikh Mirza, the father of Babur, the latter resolved to retake it, and marched accordingly with his army against it the very next season. Sheikh Zoolnoon, who held it on the part of Baesanghar Mirza, made a resolute defence, till the approach of winter obliging Babur to raise the siege, he returned to Indijan, both on that account, as well as to obtain supplies. Babur, in the year following, led his army towards Samarkand, and formed an alliance with Sooltan Ally Mirza (the brother of Baesanghar Mirza), king of Bokhara, and who was also struggling for power.