The History of Shēr Shāh (Tārīkh-i Shērshāhī) 3.16.7

3.16.7

but his minister Darya Khan wrote that the king was a minor, the chiefs at enmity among themselves, and that the Khan-khanan Yusuf-khail had taken away with him all the army of Mandu and Gujarat. 'Isa Khan observed to Sher Shah that "wherever misfortunes have befallen the Afghans from the Mughals, it has been through this man. The Khan-khanan Yusuf-khail brought the Emperor Babar into India from Kabul; and if the Emperor Humayun had acted according to what the Khan-khanan advised, he would not have repented it, and would have utterly destroyed you; but your good fortune prevailed, so that the Emperor did not act upon his advice. He must be put to death, for it is not right to allow him to live, even though he be a prisoner (at Mungir)." Sher Shah said, "Every Afghan whom I have consulted has said, 'He is an Afghan of consideration, and it is not advisable to kill him.' But my opinion has been that which 'Isa Khan has expressed." So he gave orders that the Khan-khanan, who had been kept in confinement since his capture at Mungir, and who had received a daily allowance of half a sir of unground barley, should be put to death; so he was slain. News arrived that the Emperor Humayun purposed marching towards Kanauj. Sher Khan despatched his son, by name Kutb Khan, to Mandu, in order that he might, in concert with the chiefs of those parts, alarm and ravage the country about Agra and Dehli.