Kalhana in 12th Century
Rajatarangini is a metrical legendary and historical chronicle of the north-western Indian subcontinent, particularly the kings of Kashmir. It was written in Sanskrit by Kashmiri historian Kalhana in the 12th century CE. The work consists of 7826 verses, which are divided into eight books called Tarangas ("waves").
For more detail please look at
https://en.wikipedia.org/wiki/Rajatarangini
