Mahabharata 1.49.12

वासुकिर्नागराजोऽयं दुःखितो ज्ञातिकारणात्अभिशापः स मात्रास्य भगवन्न भवेदिति

vāsukirnāgarājo'yaṃ duḥkhito jñātikāraṇātabhiśāpaḥ sa mātrāsya bhagavanna bhavediti

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