Dhritarashtra / Progeny / Start of Gita and Bhagavad / Previous Birth

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http://en.wikipedia.org/wiki/Kaurava

Two Righteous Sons

From Gandhari

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From Sukhada

http://paninformation.blogspot.com/2014/06/yuyutsu.html

http://www.asitis.com/1/1.html

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Place of Disappearance

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After the Kurukshetra war, Dhritrarashtra asked Krishna, “I had hundred sons and all of them were killed in the war. Why? Krishna replied, “Fifty lifetimes ago, you were a hunter. While hunting, you tried to shoot a male bird, but it flew away. In anger, you ruthlessly slaughtered the hundred baby birds that were there in the nest. The father-bird had to watch in helpless agony. Because you caused that father-bird the pain of seeing the death of his hundreds sons, you too had to bear the pain of your hundred 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 a hundred sons because that requires a lot of punya. Then you got the reaction for the papa (sin) that you have done fifty lifetimes ago."

Lord Krishna says in the Bhagavad-gita (4.17) gahana karmano gatih, that the way in which action and reaction works is very complex. God knows best which reaction has to be given at what time in what condition. Therefore, some reaction may come in this lifetime, some in the next and some in a distant future lifetime. 

Adi Shankara

Dhṛtarāṣṭra appears in two subsections of the Mahābhārata which are often treated as stand-alone texts, and were both commented upon by Adi Shankara.

1. He appears in the opening chapter of the Bhagavad Gītā, which takes place immediately before the start of the Kurukshetra War. The Gita's dialogue between Arjuna and Krishna is recounted as narrated to Dhṛtarāṣṭra by Sanjaya.
2. Dhṛtarāṣṭra is also a central figure in the Sanatsujatiya, in which Dhṛtarāṣṭra asks many questions to Sanatsujata, a divine sage. Sanatsujata has been invoked through meditation by Vidura, Dhṛtarāṣṭra's half-brother and counselor. https://www.youtube.com/results?search_query=Sanatsujatiya

Dhritarashtra asked Kanika / View

http://www.sacred-texts.com/hin/m01/m01143.htm
http://www.themystica.com/mystica/articles/v/vedic_management_shreyas_and_preyas.html