Mahabharata 12.29.61

उपह्वरे निवसतो यस्याङ्के निषसाद हगङ्गा भागीरथी तस्मादुर्वशी ह्यभवत्पुरा

upahvare nivasato yasyāṅke niṣasāda hagaṅgā bhāgīrathī tasmādurvaśī hyabhavatpurā

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