After the Kurukshetra war, Lord Shri Krishna told Dhritarashtra the reason for the death of his hundred sons.
Krishna replied, “50 lifetimes ago, you were a hunter. While hunting, you tried to shoot a male bird. It flew away.
In anger, you ruthlessly slaughtered the 100 baby birds in the nest. Father-bird had to watch in helpless agony.
Because you caused that father-bird the pain of seeing the death of his 100 sons, you too had to bear the pain of your 100 sons dying.
Dhritarastra said, “Ok, but why did I have to wait for fifty lifetimes?”
Krishna answered, You were accumulating punya (pious credits) during the last fifty lifetimes to get 100 sons - because that requires a lot of punya.
Then you got the reaction for the pap (sin) that you have done fifty lifetimes ago.
