nādṛṣṭvā vedavākyāni śiṣyebhyaścāpradarśya vā / granthapraṇayanaṃ teṣām arpaṇaṃ copapadyate //
It is not possible that they could have composed their texts and imparted [them] without having seen the Vedic statements or without having shown [them] to [their] pupils.