Srimad-Bhagavatam: Canto 3 - Chapter 1 - Verse 6


ययोत्तानपद: पुत्रो मुनिना गीतयार्भक: ।मृत्यो: कृत्वैव मूर्ध्‍न्यङ्‌घ्रि मारुरोह हरे: पदम् ॥ ६ ॥


yayottānapadaḥ putromuninā gītayārbhakaḥmṛtyoḥ kṛtvaiva mūrdhny aṅghrimāruroha hareḥ padam


By hearing these topics from the sage [Nārada], the son of King Uttānapāda [Dhruva] was enlightened regarding the Personality of Godhead, and he ascended to the abode of the Lord, placing his feet over the head of death.


While quitting his body, Mahārāja Dhruva, the son of King Uttānapāda, was attended by personalities like Sunanda and others, who received him in the kingdom of God. He left this world at an early age, as a young boy, although he had attained the throne of his father and had several children of his own. Because he was due to quit this world, death was waiting for him. He did not care for death, however, and even with his present body he boarded a spiritual airplane and went directly to the planet of Viṣṇu because of his association with the great sage Nārada, who had spoken to him the narration of the pastimes of the Lord.