Gurdwara Omkareshwar Sahib
Gurdwara Omkareshwar Sahib is a sikh holy shrine situated at Omkareshwar in Khandwa District of Madhya Pradesh. Guru Nanak Dev ji visited this place during their south udasi.
Guru Nanak's visit to that temple and there was discourse between Guru Nanak and the Pundit (Priest) of Omkar Temple and the bani is called Dakhni Oankar. The study of the first stanza of bani clearly indicates that Guru Nanak is talking about the philosophy of the Pundit of Omkar Temple. In rest of the Bani (from stanza # 2 to 54 including Rahaoo - Pause) Guru Nanak is clearing the confusion of the Pundit about nature and attributes of God.
Guru Nanak explains to the Pundit that there is no Trinity (Brahma, Vishnu, and Shiva) of God to which the word, 'Oankar' or 'Omkar', is implied. Guru Nanak further explains to the Pundit that God is 'One and Only'; does not come into anthropomorphic form (Ajuni); and no specific/descriptive name can be coined for God since God is an 'Eternal Entity' and ineffable.
Omkareshwar is a Hindu temple, is on an island called Mandhata or Shivapuri in the Narmada river. It is one of the 12 revered Jyotirlinga shrines of Shiva. It is about 20 km from Mortakka in Madhya Pradesh. The shape of the island is said to be like the Hindu Om symbol.