The Cambridge History of India, Vol. I: Ancient India v1.c17.14

v1.c17.14

To the north we find that the Himavant or Himālaya mountains were well known to the Rigveda, and one peak, that of Mūjavant, is referred to as the source of the Soma, the intoxicating drink which formed the most important offering in the religious practice of the time. The name is lost in modern times, but probably the peak was one of those on the south-west of the valley of Kashmīr. On the south, on the other hand, the Vindhya hills are unknown, and no mention is made of the Narbadā river, so that it may fairly be inferred that the Āryan tribes had not yet begun their advance towards the south.