Explanation:

The first known use of the word Punjab is in the book Tarikh-e-Sher Shah (1580), which mentions the construction of a fort by "Sher Khan of Punjab". The name is mentioned again in Ain-e-Akbari (part 1), written by Abul Fazal, who also mentions that the territory of Punjab was divided into two provinces, Lahore and Multan. Similarly in the second volume of Ain-e-Akbari, the title of a chapter includes the word Punjab in it. The Mughal King Jahangir also mentions the word Punjab in Tuzk-i-Janhageeri.