Mahabharata 9.36.59

9.36.59

sarasvatītīraruhairbandhanaiḥ syandanaistathā |
parūṣakavanaiścaiva bilvairāmrātakaistathā || 59 ||

Bathing in those tirthas duly and giving away wealth and diverse articles of enjoyment unto the Brahmanas, that delighter of Yadu's race also gave away diverse kinds of food and diverse desirable articles unto them. Worshipped by those regenerate ones, Vala, O king, then set out from that foremost of all tirthas on the Sarasvati (Sapta-Saraswat). Numerous feathery creatures have their home there. And it abounded with Vadari, Inguda, Ksamarya, Plaksha, Aswattha, Vibhitaka, Kakkola, Palasa, Karira, Pilu, and diverse other kinds of trees that grow on the banks of the Sarasvati. And it was adorned with forest of Karushakas, Vilwas, and Amratakas, and Atimuktas and Kashandas and Parijatas. Agreeable to the sight and most charming, it abounded with forests of plantains. And it was resorted to by diverse tribes of ascetics, some living on air, some on water, some on fruit, some on leaves, some on raw grain which they husked with the aid only of stones, and some that were called Vaneyas. And it resounded with the chanting of the Vedas, and teemed with diverse kinds of animals. And it was the favourite abode of men without malice and devoted to righteousness. Valadeva, having the plough for his weapon, arrived at that tirtha called Sapta-Saraswat, where the great ascetic Mankanaka had performed his penances and became crowned with success."