sa samrat kasya va hetoh
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
He was a great emperor and possessed all the opulences of his acquired kingdom. He was so exalted that he was increasing the prestige of the Pandu dynasty. Why did he give up everything to sit down on the bank of the Ganges and fast until death?
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Maharaja Pariksit was the Emperor of the world and all the seas and oceans, and he did not have to take the trouble to acquire such a kingdom by his own effort. He inherited it from his grandfathers Maharaja Yudhisthira and brothers. Besides that, he was doing well in the administration and was worthy of the good names of his forefathers. Consequently there was nothing undesirable in his opulence and administration. Then why should he give up all these favorable circumstances and sit down on the bank of the Ganges, fasting till death? This is astonishing, and therefore all were eager to know the cause.