Mahabharata 12.288.44

हंस उवाच · haṃsa uvāca

स्वाध्याय एषां देवत्वं व्रतं साधुत्वमुच्यतेअसाधुत्वं परीवादो मृत्युर्मानुषमुच्यते

svādhyāya eṣāṃ devatvaṃ vrataṃ sādhutvamucyateasādhutvaṃ parīvādo mṛtyurmānuṣamucyate

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