PURPORT

As stated in the Bhagavad-gita, the Lord descended on earth for the protection of the faithful and annihilation of the impious, so after the Battle of Kuruksetra and establishment of Maharaja Yudhisthira, the mission of the Lord was complete. The Pandavas, especially Sri Arjuna, were eternal companions of the Lord, and therefore Arjuna went to Dvaraka to hear from the Lord of His next program of work.