Ulugh Khan ravaged the whole of the hills with the sword, and penetrated as far as the town of Salmur, in the defiles and fastnesses of the mountains… - Minhaj-i-Siraj

Sultan-i Mu’azzam Nasiru-d dunya wau-d din ascended the throne in the Green Palace at Delhi with the most favourable auspices on Sunday, 23rd Muharram 644 H. (10th June, 1246)…Ulugh Khan-I Azam, who now held the office of lord chamberlain, ...with the help of God, ravaged the hills of Jud and the Jailam, and sent many of the Kokhars (Gakkars) and rebellious infidels to hell… In the neighbourhood of Kanauj there is a fortified village called Nandana, where there is a very strong fort vying with the wall of Alexander. A body of infidel Hindus shut themselves up in this place, resolved to fight to the extremity. For two days the royal army carried on a murderous conflict at this village, but at length the rebels were sent to hell, and the place subdued… There was in the neighbourhood a Rana who (ora) was called Dalaki wa Malaki. He had many dependants, countless fighting men, great dominion and wealth, fortified places, and hills and defiles extremely difficult of access. All these he (Ulugh Khan) ravaged. He took prisoners the wives, sons, and dependants of that accursed one, and secured great booty… …His Majesty…advanced as far as Malwa. Jahir Deo was the greatest of all the Ranas of that country and neighbourhood. He had five thousand horse and two hundred thousand infantry, but he was defeated…Ulugh exhibited great energy in this campaign… On the 16th Ramazan Ulugh Khan was sent into the hills of Delhi, to chastise the rebel inhabitants of Mewat, and to intimidate their Deo. Ten thousand horsemen in armour, and a large army of brave and warlike soldiers were under his command. Great booty was gained, and many cattle captured. Defiles and passes were cleared, strong forts were taken, and numberless Hindus perished under the merciless swords of the soldiers of Islam…

That heart which, through separation, thou madest sad;
From every joy that was, which thou madest bare of;
From thy disposition I am aware that, suddenly and unexpectedly,
The rumour may arise that thou hast broken it.

The greater number of inhabitants of that place were Brahmans, and the whole of those Brahmans had their heads shaven, and they were all slain. There were a great number of books there; and when all these books came under the observation of the Musalmans, they summoned a number of Hindus that they might give them information respecting the import of those books; but the whole of the Hindus had been killed. On being acquainted (with the contents of the books), it was found that the whole of that fortress and city was a college, and in the Hindu tongue, they call a college, Bihar [vihara].