In Hindu mythology Lord Vishnu is said to sleep while floating on the cosmic waters on the serpent Shesha. In the Puranas Shesha holds all the planets of the universe on his hoods and constantly sings the glories of Vishnu from all his mouths. He is sometimes referred to as "Ananta-Shesha," which means "Endless Shesha". In the Samudra manthan chapter of the Puranas, Shesha loosens Mount Mandara for it to be used as a churning rod by the Asuras and Devas to churn the ocean of milk in the heavens in order to make Soma (or Amrita), the divine elixir of immortality. As a churning rope another giant serpent called Vasuki is used.