Srimad Bhagavatham : 5.4.5.
Skandham-5. Chapter-4. Slokam-5. King Nabhi understood that his son, Ṛṣabhadeva, was very popular among the citizens and among government officers and ministers. Understanding the popularity of his son, Maharaja Nabhi enthroned Him as the emperor of the world to give protection to the general populace in terms of the Vedic religious system. To do this, he entrusted Him into the hands of learned brahmanas, who would guide Him in administrating the government. Then Maharaja Nabhi and his wife, Merudevi, went to Badarikasrama in the Himalaya Mountains, where the King engaged Himself very expertly in austerities and penances with great jubilation. In full samādhi he worshiped the Supreme Personality of Godhead, Nara-Narayana, who is Krishna in His plenary expansion. By doing so, in course of time Maharaja Nabhi was elevated to the spiritual world known as Vaikuntam. When Maharaja Nabhi saw that his son Rshabhadeva was popular with the general populace and the governme