Mahabharata 3.104.2
महता कालयोगेन प्रकृतिं यास्यतेऽर्णवःज्ञातीन्वै कारणं कृत्वा महाराज्ञो भगीरथात्
mahatā kālayogena prakṛtiṃ yāsyate'rṇavaḥjñātīnvai kāraṇaṃ kṛtvā mahārājño bhagīrathāt
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book