The History of Shēr Shāh (Tārīkh-i Shērshāhī) 3.22.5

3.22.5

and by the time of afternoon prayers captured the fort, putting every one to the sword, and sending all the infidels to hell. About the hour of evening prayers, the intelligence of the victory reached Sher Shah, and marks of joy and pleasure appeared on his countenance. Raja Kirat Sing, with seventy men, remained in a house. Kutb Khan the whole night long watched the house in person lest the Raja should escape. Sher Shah said to his sons that none of his nobles need watch the house, so that the Raja escaped out of the house, and the labour and trouble of this long watching was lost. The next day at sunrise, however, they took the Raja alive. On the 10th Rabi'u-l awwal, 952 a.h. (May, 1545 a.d.), Sher Shah went from the hostel of this world to rest in the mansion of happiness, and ascended peacefully from the abode of this world to the lofty heavens. The date was discovered in the words az atash murd, "He died from fire."