Mahabharata 3.198.79

पारणं चापि विद्यानां तीर्थानामवगाहनम्क्षमा सत्यार्जवं शौचं शिष्टाचारनिदर्शनम्

pāraṇaṃ cāpi vidyānāṃ tīrthānāmavagāhanamkṣamā satyārjavaṃ śaucaṃ śiṣṭācāranidarśanam

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