Bhagavatapurana 4.12.14

4.12.14

evaṃ bahu-savaṃ kālaṃ mahātmāvicalendriyaḥ /
tri-vargaupayikaṃ nītvā putrāyādān nṛpāsanam //

14. Having thus spent a very very long period in righteous works leading to the attainment of the three purposes viz. (Dharma, Artha and Kāma), the high-souled Dhruva with perfect control over his senses, at last made over his throne to his son.