Srimad Bhagavatam

References to text SB 6.1.15
SB 6.1.15: Only a rare person who has adopted complete, unalloyed devotional service to Kṛṣṇa can uproot the weeds of sinful actions with no possibility that they will revive. He can do this simply by discharging devotional service, just as the sun can immediately dissipate fog by its rays.

Text №
O Supreme Personality of Godhead, there are ten prescribed methods on the path to liberation — to remain silent, not to speak to anyone, to observe vows, to amass all kinds of Vedic knowledge, to undergo austerities, to study the Vedas and other Vedic literatures, to execute the duties of varṇāśrama-dharma, to explain the śāstras, to stay in a solitary place, to chant mantras silently, and to be absorbed in trance. These different methods for liberation are generally only a professional practice and means of livelihood for those who have not conquered their senses. Because such persons are falsely proud, these procedures may not be successful.
Prahlada Pacifies Lord Nrisimhadeva with Prayers
SB 7.9.46
BhagÄŤratha said: Those who are saintly because of devotional service and are therefore in the renounced order, free from material desires, and who are pure devotees, expert in following the regulative principles mentioned in the Vedas, are always glorious and pure in behavior and are able to deliver all fallen souls. When such pure devotees bathe in your water, the sinful reactions accumulated from other people will certainly be counteracted, for such devotees always keep in the core of their hearts the Supreme Personality of Godhead, who can vanquish all sinful reactions.
The Dynasty of Amsuman
SB 9.9.6