SB 4.8.39
maitreya uvaca
ity udahrtam akarnya
bhagavan naradas tada
pritah pratyaha tam balam
sad-vakyam anukampaya
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The sage Maitreya continued: The great personality Narada Muni, upon hearing the words of Dhruva Maharaja, became very compassionate toward him, and in order to show him his causeless mercy, he gave him the following expert advice.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Since the great sage Narada is the foremost spiritual master, naturally his only activity is to bestow the greatest benefit upon whomever he meets. Dhruva Maharaja, however, was a child, and so his demand was also that of a playful child. Still, the great sage became compassionate toward him, and for his welfare he spoke the following verses.