Srimad Bhagavatam Canto 04, Chapter 11, Text 01

SB 4.11.1

maitreya uvaca
nisamya gadatam evam
rsinam dhanusi dhruvah
sandadhe ’stram upasprsya
yan narayana-nirmitam
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
 
Sri Maitreya said: My dear Vidura, when Dhruva Maharaja heard the encouraging words of the great sages, he performed the acamana by touching water and then took up his arrow made by Lord Narayana and fixed it upon his bow.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
 
Dhruva Maharaja was given a specific arrow made by Lord Narayana Himself, and he now fixed it upon his bow to finish the illusory atmosphere created by the Yaksas. As it is stated in the Bhagavad-gita (7.14), mam eva ye prapadyante mayam etam taranti te. Without Narayana, the Supreme Personality of Godhead, no one is able to overcome the action of the illusory energy. Sri Caitanya Mahaprabhu has also given us a nice weapon for this age, as stated in the Bhagavatam: sangopangastra — in this age, the narayanastra, or weapon to drive away maya, is the chanting of the Hare Krsna mantra in pursuance of the associates of Lord Caitanya, such as Advaita Prabhu, Nityananda, Gadadhara and Srivasa.
Srimad Bhagavatam Canto 04, Chapter 11, Text 02