Dhruva, ध्रुव, in Hindu scriptures, was an ardent young devotee of Vishnu, a prince blessed to eternal existence and glory as the Pole Star (Dhruva Nakshatra in Sanskrit) by Lord Vishnu. The story of Dhruva's life is often told to Hindu children as an example for perseverance, devotion, steadfastness and fearlessness. The original sources are Vishnu Purana and Bhagavata Purana, Canto 4.
Dhruva was born a son of the King Uttānapāda (the son of Svayambhuva Manu) and his wife Suniti (or Sunrita, the daughter of Dharma). The king also had another son Uttama, born to his second queen Suruchi, who was the preferred object of his affection. Once, when Dhruva was but a child of five years of age, the two princes playfully raced towards their father's lap. But, the headstrong Suruchi chided Dhruva and insulted him for trying to woo the attention of his father, when he did not deserve it because "he was not born to her." She further mocked at his plight, by asking him to redeem himself by seeking Vishnu's blessings.
Suniti consoled the distraught child, by asking him to take Suruchi's words seriously and to observe penance in meditation of the Lord. She bid him farewell as he set out on a lonely journey to the forest. Dhruva was determined to seek for himself his rightful place, and noticing this resolve, the divine sage Narada appeared before him and tried to desist him from assuming a severe austerity upon himself at such a tender age. But, Dhruva's fierce determination knew no bounds, and the astonished sage guided him towards his goal by teaching him the rituals and mantras. The one mantra which Narada taught and which was effectively used by Dhruva was OM NAMO BHAGAVTE VĀSUDEVĀYA.