Mahabharata 1.90.50

शंतनुः खलु गङ्गां भागीरथीमुपयेमेतस्यामस्य जज्ञे देवव्रतःयमाहुर्भीष्म इति

śaṃtanuḥ khalu gaṅgāṃ bhāgīrathīmupayemetasyāmasya jajñe devavrataḥyamāhurbhīṣma iti

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