If a person hears about, glorifies, meditates upon, worships or simply offers great respect to the Supreme Lord, who is situated within the heart, the Lord will remove from his mind the contamination accumulated during many thousands of lifetimes.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
श्रुतः सङ्कीर्तितो ध्यातः पूजितश्चादृतोऽपि वा । नृणां धुनोति भगवान् हृत्स्थो जन्मायुताशुभम्
śrutaḥ saṅkīrtito dhyātaḥ pūjitaścādṛto'pi vā | nṛṇāṃ dhunoti bhagavān hṛtstho janmāyutāśubham
SB 12.3.46