Mahabharata 12.79.11

इत्येवं संप्रवर्तन्त व्यवहाराः पुरातनाःऋषीणामितरेषां च साधु चेदमसंशयम्

ityevaṃ saṃpravartanta vyavahārāḥ purātanāḥṛṣīṇāmitareṣāṃ ca sādhu cedamasaṃśayam

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