Valmiki Ramayana Aranya Kanda Sarga 68 Shloka 35
Original Shlokaततो गोदावरीं गत्वा नदीं नरवरात्मजौ।।3.68.35।। उदकं चक्रतुस्तस्मै गृध्रराजाय तावुभौ।
1 source checked for this shloka
ततः then, उभौ तौ they both, नरवरात्मजौ two princes, गोदावरीं नदीम् to river Godavari, गत्वा after reaching, तस्मै for him, गृद्रराजाय for the vultureking, उदकम् libations, चक्रतुः offered.
Then both the princes went down to river Godavari and offered libations for the king of vultures.