Samudra manthan (Sanskrit?, lit. churning of the ocean) is one of the most famously recognised episodes in the Hindu mythology. The legendary epic appears in the Bhagavata Purana, the Mahabharata and the Vishnu Purana. The samudra manthan explains the origin of amrita, the drink of immortality.
Indra, the King of heaven, while riding on the elephant Airavata, came across Sage Durvasa who offered him a special garland given to him by Lord Shiva. Indra accepted the garland and placed it on the trunk of the elephant as a test to prove that he was not an egoistic god. The elephant, knowing that Indra had no control over his own ego, threw the garland to the ground. This enraged the sage as the garland was a dwelling of Sri (fortune) and was to be treated as a prasada or religious offering. Durvasa cursed Indra and all devas to be bereft of all strength, energy, and fortune.
In battles following the incident, the Devas were defeated and Asuras (demons) led by Bali, gained control of the universe. Devas sought help from the Supreme God Vishnu who advised them to treat asuras in a diplomatic manner. Devas formed an alliance with asuras to jointly churn the ocean for the nectar of immortality and to share it among them. However, Vishnu told the Devas that he would arrange for them alone to obtain the nectar.
The churning of the Ocean of Milk was an elaborate process. Mount Mandara was used as the churning rod, and Vasuki, the king of serpents, who abides on Shiva's neck, became the churning rope. The demons demanded to hold the head of the snake, while the gods, taking advice from Vishnu, agreed to hold its tail. As a result, the demons were poisoned by fumes emitted by Vasuki. Despite this, the gods and demons pulled back and forth on the snake's body alternately, causing the mountain to rotate, which in turn churned the ocean. When the mountain was placed on the ocean, it began to sink. Vishnu, in the form of a turtle Kurma, came to their rescue and supported the mountain on his back.
The Samudra Manthana process released a number of things from the Ocean of Milk. One was the lethal poison known as Halahala, which in some versions of the story, escaped from the mouth of the serpent king as the demons and gods churned. This terrified the gods and demons because the poison was so powerful that it could destroy all of creation. Then the gods approached Shiva for protection. Shiva consumed the poison in an act to protect the universe, and his consort, Parvati, grabbed Shiva's throat in an effort to prevent the most deadly poison from affecting the universes inside Lord Shiva. As a result, Shiva's throat turned blue. For this reason, Lord Shiva is also called Neelakantha (the blue-throated one; "neela" = "blue", "kantha" = "throat" in Sanskrit).
All kinds of herbs were cast into the ocean and fourteen Ratnas (gems or treasures) were produced from the ocean and were divided between asuras and gods. Though usually the Ratnas are enumerated as 14, the list in the scriptures ranges from 9 to 14 Ratnas. Most lists include: According to the quality of the treasures produced, they were accepted by Shiva ( because of consuming the poison), Vishnu, Maha rishi's (for the accepting kamadevi), or Surabhi ,which was given by Vishnu, the devas and the asuras. There were three categories of Goddesses which emerged from the ocean;
Likewise = 3 types of supernatural animals appeared;
There were three valuables;
Additionally produced were;
Finally, Dhanvantari, the heavenly physician, emerged with a pot containing Amrita, the heavenly nectar of immortality. Fierce fighting ensued between Devas and Asuras for the nectar. To protect the nectar from Asuras, the divine Garuda took the pot, and flew away from the battle-scene.
The Devas appealed to Vishnu, who then took the form of Mohini and as a beautiful and enchanting damsel, Mohini distracted the asuras, took the amrita, and distributed it among the Devas, who drank it. Asura RahuKetu, disguised himself as a deva and drank some nectar. Due to their luminous nature, the sun god Surya and the moon god Chandra noticed the switching of sides. They informed Mohini. But before the nectar could pass his throat, Mohini cut off his head with her divine discus, the Sudarshana Chakra. But as the nectar had gone down his throat he did not die. From that day, his head was called Rahu and body was called Ketu. Later Rahu and Ketu became planets. The story ends with the rejuvenated Devas defeating the asuras.
The medieval Hindu theology extends this legend to state that while the Devas were carrying the amrita away from the Asuras, drops of amrita fell at four places on the Earth. In one version of the legend, the carrier who spills the amrita is the divine physician Dhanavantari, who stops at four places on the Earth. In other re-tellings, the carrier who spills the amrita is either Garuda, Indra or Mohini. The four places where the amrita was spilled were: Haridwar, Prayaga (Allahabad), Trimbak (Nashik) and Ujjain. According to the legend, these four places acquired a certain mystical power and spirituality. A Kumbh Mela is celebrated at the four places every twelve years for this reason. People believe that after bathing there during the Kumbha mela, one can attain moksha (salvation).
While several ancient texts, including the various Puranas mention the samudra manthan legend, none of them mentions spilling of the amrita at four places. Neither do these texts mention the Kumbh Mela. Therefore, multiple scholars, including R. B. Bhattacharya, D. P. Dubey and Kama Maclean believe that the samudra manthana legend has been applied to the Kumbha Mela relatively recently, in order to show scriptural authority for the mela.
The Hindu myth has been analyzed comparatively by Georges Dumézil, who connected it to various Indo-European myths and even the European medieval legend of the Holy Grail, reconstructing an original myth (the "ambrosia cycle", or "cycle of the mead") about a trickster deity who steals a drink of immortality for mankind but fails in freeing humans from death. Dumézil later abandoned his theory, but the core of the idea was taken up by Jarich Oosten, who posits similarities with the Hymiskviða. In this Old Norse poem, a sacred mead is prepared by cooperating gods and giants (corresponding to devas and asuras, respectively), with the gods ultimately winning the drink. The serpent Jörmungandr takes the place of Vasuki (although its role in the story is different), and the two myths share themes of competition between men, sharing by women.