gangaya yamuna vahe hana eka-dhara
pascime yamuna vahe, purve ganga-dhara
gangaya—with the river Ganges; yamuna—the river Yamuna; vahe—flows; hana—becoming; eka-dhara—one stream; pascime—on the western side; yamuna—the river Yamuna; vahe—flows; purve—on the eastern side; ganga-dhara—the flow of the Ganges.
Advaita Acarya then explained that at that spot both the Ganges and Yamuna flow together. On the western side was the Yamuna, and on the eastern side was the Ganges.
Link to this page: https://prabhupadabooks.com/cc/madhya/3/36