Muntakhab al-tawarikh 49.1.6

49.1.6

And in the month of Muharram 800 H. (1397 A.D.) a severe engagement took place between the two parties in the neighbourhood of the village of Kotla; Sarang Khan was defeated and fled towards Multan, and Tatar Khan proceeded to the frontier of Tilaundi, and sending Kamalu-d-Din Mubin in pursuit of Sarang Khan, returned. And in the month of Rabi‘u-l-Awwal in the year already mentioned, Mirza Pir Muhammad, grandson of the great Amir Timur Gurgan King of Sintasan and Mawara an-Nahr, had crossed the river Indus, and was besieging the fortress of Uchh. ‘Ali Malik, Sarang Khan's lieutenant, fought and held the fort for a month, and when Malik Taju-d-Din Bakhtyar arrived at the fort of Uchh with a thousand cavalry given him by Sarang Khan, Mirza Pir Muhammad left Uchh, and taking Malik Taju-d-Din Bakhtyar and his thousand sowars unawares in their position on the banks of the river Biah, attacked them. The greater number of Malik Taju-d-Din’s force fell by the sword, while those who escaped the sword were drowned in the floods of destruction, and Mirza Pir Muhammad after gaining this victory pursued them with all speed, and invested the fortress of Multan. Sarang Khan held out against him for six months engaging him frequently, but at last begged for quarter, and had an interview with the Mirza, who took up his station in Multan pending the arrival of the great Timur.