The great sage Maitreya continued: The instruction of Dhruva Mahārāja’s mother, Sunīti, was actually meant for fulfilling his desired objective. Therefore, after deliberate consideration and with intelligence and fixed determination, he left his father’s house.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
मैत्रेय उवाच । एवं सञ्जल्पितं मातुराकर्ण्यार्थागमं वचः । सन्नियम्यात्मनाऽऽत्मानं निश्चक्राम पितुः पुरात्
maitreya uvāca | evaṃ sañjalpitaṃ māturākarṇyārthāgamaṃ vacaḥ | sanniyamyātmanā''tmānaṃ niścakrāma pituḥ purāt
SB 4.8.24