Valmiki Ramayana Bala Kanda Sarga 35 Shloka 8
Original Shlokaतां दृष्ट्वा पुण्यसलिलां हंससारससेविताम्। बभूवुर्मुदिता स्सर्वे मुनयस्सह राघवा:।।1.35.8।।
1 source checked for this shloka
पुण्यसलिलाम् having sacred waters, हंससारससेविताम् attended by swans and cranes, ताम् दृष्ट्वा having seen that (river Ganga), सहराघवा: along with Rama and Lakshmana, सर्वे मुनय: all the sages, मुदिता: बभूवु: were delighted.
On seeing the river Ganga with swans and cranes floating on the surface of the sacred waters, all the sages including the sons of the Raghus (Rama and Lakshmana) were delighted.