Mahabharata 3.81.97

सप्तसारस्वतं तीर्थं ततो गच्छेन्नराधिपयत्र मङ्कणकः सिद्धो महर्षिर्लोकविश्रुतः

saptasārasvataṃ tīrthaṃ tato gacchennarādhipayatra maṅkaṇakaḥ siddho maharṣirlokaviśrutaḥ

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