According to Hindu scriptures Lord Shiva's snake Vasuki took part in the Samudra Manthan, that explains the origin of amrita or the nectar of immortality. Vasuki helped both the devas and the asuras to bind him to Mount Mandara or Mandar Parvat so that they could use him as their churning rope to get the amrita from the ocean. Vasuki is mentioned extensively in Hindu scriptures and the epics of Ramayana and Mahabharata.
In the Buddhist mythology, Vasuki and the other snake gods appear in the audience when Gautama Buddha gave his sermons. In India, devotees pray to several snake gods on Nag Panchami. Some among them are Ananta, Shesha, Padma, Kambala, Kaliya and Vasuki.