By worship of this subtle form of the Vedas, O brāhmaṇa, 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 Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
यदुपासनया ब्रह्मन् योगिनो मलमात्मनः । द्रव्यक्रियाकारकाख्यं धूत्वा यान्त्यपुनर्भवम्
yadupāsanayā brahman yogino malamātmanaḥ | dravyakriyākārakākhyaṃ dhūtvā yāntyapunarbhavam
SB 12.6.38