 The Narmada River (also called the Rewa, from its leaping motion (from the root "rev" through its rocky bed) where the Banalinga stones are found, has been mentioned by Ptolemy and the author of the Periplus.The Ramayana, the Mahabharata and Puranas refer to it frequently.The Rewa Khand of Vayu Purana and the Rewa Khand of Skanda Purana are entirely devoted to the story of the birth and the importance of the Narmada River.