Mahabharata 13.80.42
अध्यापयेरञ्शिष्यान्वै गोमतीं यज्ञसंमिताम्त्रिरात्रोपोषितः श्रुत्वा गोमतीं लभते वरम्
adhyāpayerañśiṣyānvai gomatīṃ yajñasaṃmitāmtrirātropoṣitaḥ śrutvā gomatīṃ labhate varam
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book