Mahabharata 14.75.20

तस्मिन्निपतिते नागे वज्रदत्तस्य पाण्डवःतं न भेतव्यमित्याह ततो भूमिगतं नृपम्

tasminnipatite nāge vajradattasya pāṇḍavaḥtaṃ na bhetavyamityāha tato bhūmigataṃ nṛpam

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