Mahabharata 12.181.15

वर्णाश्चत्वार एते हि येषां ब्राह्मी सरस्वतीविहिता ब्रह्मणा पूर्वं लोभात्त्वज्ञानतां गताः

varṇāścatvāra ete hi yeṣāṃ brāhmī sarasvatīvihitā brahmaṇā pūrvaṃ lobhāttvajñānatāṃ gatāḥ

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