Bhagavatapurana 10.5.4

10.5.4

kālena snāna-śaucābhyāṃ saṃskārais tapasejyayā /
śudhyanti dānaiḥ santuṣṭyā dravyāṇy ātmātma-vidyayā //

4. Several things get purified under several circumstances or processes, to wit, some by time, some by bathing or washing, some by special rites, or by tapas, or by sacrificial performances; some by charitable gifts, some by contentment; so also the jiva by the contemplation and knowledge of the omnipresent Lord.