Mahabharata 13.147.15

न तेषां भिद्यते वृत्तं यज्ञस्वाध्यायकर्मभिःआचारः कारणं चैव धर्मश्चैव त्रयं पुनः

na teṣāṃ bhidyate vṛttaṃ yajñasvādhyāyakarmabhiḥācāraḥ kāraṇaṃ caiva dharmaścaiva trayaṃ punaḥ

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