In the Latyayana Srautasutra (10.15-19) the Sarasvati seems to be a perennial river up to the Vinasana, which is west of its confluence with the Drshadvati (Chautang). The Drshadvati is described as a seasonal stream (10.17), meaning it was not from Himalayas. Bhargava has identified Drashadwati river as present day Sahibi river originating from Jaipur hills in Rajasthan. The Asvalayana Srautasutra and Sankhayana Srautasutra contain verses that are similar to the Latyayana Srautasutra.