Nandi (), also known as Nandikeshwara or Nandideva, is the bull vahana of the Hindu god Shiva. He is also the guardian deity of Kailash, the abode of Shiva. Almost all Shiva temples display stone-images of a seated Nandi, generally facing the main shrine. According to Saivite siddhantic tradition, he is considered as the chief guru of eight disciples of Nandinatha Sampradaya, namely, Sanaka, Sanatana, Sanandana, Sanatkumara, Tirumular, Vyagrapada, Patanjali, and Sivayoga Muni, who were sent in eight different directions, to spread the wisdom. The Cham Hindus of Vietnam believes that when they die, the Nandi will come and take their soul to the holy land of India from Vietnam. The Sanskrit word nandi () has the meaning of happy, joy, and satisfaction, the properties of divine guardian of Shiva- Nandi. It is recently documented, that the application of the name Nandi to the bull (Sanskrit: Vṛṣabha), is in fact a development of recent syncretism of different regional beliefs within Saivism. The name Nandi was widely used instead for an anthropomorphic door-keeper of Kailasha, rather than his mount, in the oldest Saivite texts in Sanskrit, Tamil, and other Indian languages. Siddhantic texts clearly distinct Nandi from Vṛṣabha. According to them, Devi, Chandesha, Mahakala, Vṛṣabha, Nandi, Ganesha, Bhringi, and Murugan, are the eight Ganeshwaras (commanders) of Shiva. History and legends Nandi is described as the son of the sage Shilada. Shilada underwent severe penance to have a boon– a child with immortality and blessings of Lord Shiva, and received Nandi as his son. Legends say that Nandi was born from a Yajna performed by the Shilada. Nandi grew as an ardent devotee of Lord Shiva and he performed severe penance to become his gate-keeper, as well as his mount, on the banks of river Narmada, near Tripur Tirth Kshetra in present-day Nandikeshwar Temple, in Jabalpur, Madhya Pradesh. Nandi got the divine-knowledge of Agamic and Tantric wisdom taught by Shiva, from goddess Parvati. He could teach that divine-knowledge to his eight disciples, who are identified as the progenitors of Nandinatha Sampradaya, namely, Sanaka, Sanatana, Sanandana, Sanatkumara, Tirumular, Vyagrapada, Patanjali, and Sivayoga Muni. These eight disciples were sent in eight different directions of the world by Nandi, to spread this knowledge. Many other puranic tales are available about Nandi. One describes his conflict with Ravana, the antagonist of Ramayana. Nandi cursed Ravana (the demon King of Lanka), that his kingdom would be burnt