Son/Sone

Sone River, also spelt Son River, is a perennial river located in central India. It originates near Amarkantak Hill in Pendra (Gaurela-Pendra-Marwahi district), Chhattisgarh and finally merges with the Ganges river near Maner in Patna, Bihar. The Sone River is the second-largest southern tributary of the Ganges after the Yamuna River. India's oldest river bridge Koilwar Bridge over the Sone River connects Arrah with Patna. Sone river is famous for its sand across country. Multiple dams and hydro-electric projects run on its course towards the Ganges.The river is also mentioned in Valmiki Ramayans's Balkand where Ram. Laxman along with Vishvamitra is crossing the river to further go north towards Ganga.

Quelle: Wikipedia