Vana Parva 188.92

O foremost of men when wandering about in his stomach, I saw within it, the Ganga, the Satadru, the Sita, the Yamuna, the Kausaku, the Charmanvati, the Vetravati, the Chandrabhaga, the Sarasvati, the Sindhu, the Vipasa, the Godavari, the Vasvokasara, the Nalini, the Narmada, the Tamra, the Vena of fearful currents and sacred waters, the Suvena, the Krishnavena, the Irama, the Mahanadi, the Vitasta, that large river Kaveri, the Vishalya, the Kimpuna and many others.