The History of Shēr Shāh (Tārīkh-i Shērshāhī) 3.5.4

3.5.4

And if (which God avert) the Mughals should defeat Sultdn Ibrahim, then indeed I must of necessity ally myself to Bihar Khan, and remain in his service." After some time news came that the two monarchs had joined battle on the field of Panipat, and that after a severe contest Sultdn Ibrdhim had been slain, and that the kingdom of Dehli had fallen into the hands of the Emperor Babar, in the year 932. * * Farid Khan, being thus compelled, went to Bihar Khan, and entered into his service, and employed himself day and night in his business; nor did he rest one moment from it, and from this good service he gained Bihdr Khdn's favour; so that he had access to him in public and in private, and became one of his most intimate friends. In consequence of his excellent arrangements, he became celebrated throughout the country of Bihar. One day he went out hunting with Bihar Khan, and a tiger [sher] having been started, Farid Khan slew it. Bihdr Khan, who on the death of Sultdn Ibrahim had assumed the title of "Sultan Muhammad," and had caused coin to be struck, and the khutba to be read in his own name throughout the country of Bihdr, gave to Farid Khdn, on account of this gallant encounter, the title of "Sher Khan," and made him the deputy to his son Jaldl Khan.