Mahabharata 5.6.18

वैशंपायन उवाच · vaiśaṃpāyana uvāca

तथानुशिष्टः प्रययौ द्रुपदेन महात्मनापुरोधा वृत्तसंपन्नो नगरं नागसाह्वयम्

tathānuśiṣṭaḥ prayayau drupadena mahātmanāpurodhā vṛttasaṃpanno nagaraṃ nāgasāhvayam

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