Saraswati

The alliance between the Saraswati, Ganges, and Yamuna rivers is likely the origin of the idea that the three divine rivers meet in a triple confluence (triveni sangam) at Prayagraj, where the Ganges and Yamuna meet physically and the Saraswati is said to join invisibly as a mythical river.…

…river of importance is the Sarasvati, which loses itself in desert; it was personified as a goddess of eloquence and learning.

…dry course of the ancient Saraswati River, which flowed south of the Sutlej River and then, perhaps, southward to the Indian Ocean, east of the main course of the Indus itself. Outside the Indus system a few sites occur on the Makran Coast, the westernmost of which is at Sutkagen…

…in the north to the Sarasvati and upper Ganges–Yamuna Doab in the south. The Sarasvati, the sacred river at the time, is thought to have dried up during the later Vedic period. Conceived as a goddess (see Sarasvati), it was personified in later Hinduism as the inventor of spoken and…