Valmiki Ramayana Ayodhya Kanda Sarga 113 Shloka 21

ततः thereafter, ते सर्वे all of them, दिव्याम् divine, ऊर्मिमालिनीम् wreathed with waves, यमुनां नदीम् river Yamuna, तीर्त्वा having crossed, शुभजलाम् of auspicious waters of, तां गङ्गां that Ganga, नदीम् river, पुनः again, ददृशुः beheld.

Thereafter, all of them crossed the divine river Yamuna wreathed in waves and, beheld the Ganga of sacred waters once again.