Bhagavatapurana 4.23.10

10. As the pious king was doing the righteous duties delightful to the Lord and constantly exerting himself with faith, his devotion to the glorious Brahman became absolute (was not distracted by any other object).

11. By virtue of this perfect devotion and by having rendered his mind pure and *Satvic* through his worship of the Lord he attained perfect renunciation and powerful wisdom with which he cut off his vesture as *jiva*, the source of doubt (and wrong notions).