Mahabharata 3.198.92

कर्मणा श्रुतसंपन्नं सतां मार्गमनुत्तमम्शिष्टाचारं निषेवन्ते नित्यं धर्मेष्वतन्द्रिताः

karmaṇā śrutasaṃpannaṃ satāṃ mārgamanuttamamśiṣṭācāraṃ niṣevante nityaṃ dharmeṣvatandritāḥ

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