Mahabharata 14.70.10

ततः कतिपयाहस्य व्यासः सत्यवतीसुतःआजगाम महातेजा नगरं नागसाह्वयम्

tataḥ katipayāhasya vyāsaḥ satyavatīsutaḥājagāma mahātejā nagaraṃ nāgasāhvayam

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