Valmiki Ramayana Ayodhya Kanda Sarga 71 Shloka 9

 राघवः the descendant of Raghu (Bharata), विश्रुते in the famous, प्राग्वटे Pragvata, पुरे city, अंशुधाने at a place known as Anshudhana, दुष्प्रतराम् difficult to cross, महानदीम् mighty river, भागीरथीम् Bhagirathi, तूर्णम् quickly, उपायात् reached.

 Bharata, the descendant of Raghu, knowing that the mighty river Bhagirathi was difficult to cross at a place known as Anshudhana, quickly reached the famous city of Pragvata.