Srimad Bhagavatam Canto 04, Chapter 10, Text 30

SB 4.10.30

munaya ucuh
auttanapada bhagavams tava sarngadhanva
devah ksinotv avanatarti-haro vipaksan
yan-namadheyam abhidhaya nisamya caddha
loko ’ñjasa tarati dustaram anga mrtyum
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
 
All the sages said: Dear Dhruva, O son of King Uttanapada, may the Supreme Personality of Godhead known as Sarngadhanva, who relieves the distresses of His devotees, kill all your threatening enemies. The holy name of the Lord is as powerful as the Lord Himself. Therefore, simply by chanting and hearing the holy name of the Lord, many men can be fully protected from fierce death without difficulty. Thus a devotee is saved.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
The great rsis approached Dhruva Maharaja at a time when his mind was very perplexed due to the magical feats exhibited by the Yaksas. A devotee is always protected by the Supreme Personality of Godhead. By His inspiration only, the sages came to encourage Dhruva Maharaja and assure him that there was no danger because he was a soul fully surrendered to the Supreme Lord. By the grace of the Lord, if a devotee, at the time of death, can simply chant His holy name — Hare Krsna, Hare Krsna, Krsna Krsna, Hare Hare/ Hare Rama, Hare Rama, Rama Rama, Hare Hare — simply by chanting this maha-mantra he immediately surpasses the great ocean of the material sky and enters the spiritual sky. He never has to come back for repetition of birth and death. Simply by chanting the holy name of the Lord, one can surpass the ocean of death, so Dhruva Maharaja was certainly able to surpass the illusory magical feats of the Yaksas, which for the time being disturbed his mind.
 
Thus end the Bhaktivedanta purports of the Fourth Canto, Tenth Chapter, of the Srimad-Bhagavatam, entitled “Dhruva Maharaja’s Fight with the Yaksas.”
Srimad Bhagavatam Canto 04, Chapter 10, Text 29
Srimad Bhagavatam Canto 04, Chapter 10, Text 13