Mahabharata 12.326.53

ध्रुवं च ज्योतिषां श्रेष्ठं पश्य नारद खेचरम्अम्भोधरान्समुद्रांश्च सरांसि सरितस्तथा

dhruvaṃ ca jyotiṣāṃ śreṣṭhaṃ paśya nārada khecaramambhodharānsamudrāṃśca sarāṃsi saritastathā

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