Kashmir has been one of the most important centres for the spread and development of Buddhism. Buddhism was an important part of the classical Kashmiri culture, as is reflected in the Nilamata Purana and the Kalhana's Rajatarangini. Buddhism is generally believed to have become dominant in Kashmir in the time of Emperor Ashoka, although it was widespread there long before his time. It enjoyed the patronage not only of the Buddhist rulers but of Hindu and early Muslim rulers too. From Kashmir, it spread to the neighbouring Ladakh.
The religious significance of the river is established by the Nilamata Purana when it records the entire land of Kashmir as the material manifestation of Uma and describes her as the divine form of the Vitasta."