Valmiki Ramayana Bala Kanda Sarga 44 Shloka 10

अनघ O Sinless one, महाभाग O Blessed one, राजार्षिणा by the royal saint, गुणवता virtuous, महर्षिसमतेजसा possessing the splendour of a maharshi, मत्तुल्यतपसा equal to me in austerities, क्षत्रधर्मस्थितेन abiding in the duties of a Kshatriya, अतितेजसा by the highly lustrous, गङ्गाम् Ganga, प्रार्थयता beseeching, तव your, पित्रा by father, दिलीपेन by Dilipa, महाभाग O Distinguished one, आनेतुं पुन: for bringing, न शङ्किता it was not made possible.

O Sinless one (Bhagiratha) O Distinguished one on the part of Dilipa brilliant your father who had the virtuous of a rajarshi, who was equal to a maharshi in splendour, and to me in austerities and abiding to the duties of a kshatriya it was even not possible to bring Ganga through prayer.