Mahabharata 3.61.105
कन्दरांश्च नितम्बांश्च नदांश्चाद्भुतदर्शनान्ददर्श सा भीमसुता पतिमन्वेषती तदा
kandarāṃśca nitambāṃśca nadāṃścādbhutadarśanāndadarśa sā bhīmasutā patimanveṣatī tadā
Our plain-language meaning of this verse is waiting for scholar review.