Srimad Bhagavatam Canto 12, Chapter 06, Text 38

SB 12.6.38

yad-upasanaya brahman
 yogino malam atmanah
dravya-kriya-karakakhyam
 dhutva yanty apunar-bhavam
 
Translation: 
 
By worship of this subtle form of the Vedas, O brahmana, mystic sages cleanse their hearts of all contamination caused by impurity of substance, activity and doer, and thus they attain freedom from repeated birth and death.
Srimad Bhagavatam Canto 12, Chapter 06, Text 37
Srimad Bhagavatam Canto 12, Chapter 06, Text 39