Who is sarvan Kumar?

Shravan Kumar is a boy who accidentally killed by king dasharath who was the father of lord rama,laxman,bharat and Shatrughan.Shravan kumar was famous for his extreme love ,devotion towards his blind parents when shravan take his family to the temple in between dasharath accidentally pierced shravan chest by his bow and arrow because of this sharavan kumar died on the spot.When the family knew about the death they cursed king dasharath and after sometime they also die.