Mahabharata 12.346.10

ब्राह्मण उवाच · brāhmaṇa uvāca

उपदेशेन युष्माकमाहारोऽयं मया वृतःद्विरूनं दशरात्रं वै नागस्यागमनं प्रति

upadeśena yuṣmākamāhāro'yaṃ mayā vṛtaḥdvirūnaṃ daśarātraṃ vai nāgasyāgamanaṃ prati

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