Mahabharata 14.44.20

इष्टं दत्तं तपोऽधीतं व्रतानि नियमाश्च येसर्वमेतद्विनाशान्तं ज्ञानस्यान्तो न विद्यते

iṣṭaṃ dattaṃ tapo'dhītaṃ vratāni niyamāśca yesarvametadvināśāntaṃ jñānasyānto na vidyate

Our plain-language meaning of this verse is waiting for scholar review.