Wih ine undersandinae ht wheln he emtyda pn re m theuetrhe nf ck mulk. ocean they would share it equally, the demigods and the demons brought the snake Vasuki
to be used as the rope for the churning rod. By the expert arrangement of the Supreme Lord, the demons held the snake near the mouth, whereas the demigods held the tail of the great snake. Then with great endeavor they began pulling the snake back and forth. Because the churning rod, Mandara Mountain, was very heavy and was not held by any support in the water, it sank into the ocean, and in this way the prowess of both the demons and the demigods was vanquished
The Supreme Lord then appeared in the form of a tortoise and supported Mandara Mountain on His back. Then the churning resumed with great force. As a result of the churning, a huge amount of poison named kālakūṭa was produced. The Prajāpatis, seeing no one else to save them, approached Lord Śiva and offered him prayers full of truth.
Śiva readily agreed to drink all the poison generated by the churning. The goddess Durgā, Śiva's wife, was not at all disturbed when Lord Śiva agreed to drink the poison, for she knew his prowess. Indeed, she expressed her pleasure at this agreement. Then Lord Śiva gathered the devastating poison, which was everywhere. He took it in his hand and drank it, and after he drank the poison his neck became bluish.
A small quantity of the poison dropped from his hands to the ground, and it is because of this poison that there are poisonous snakes, scorpions, toxic plants, and other poisonous things in this world.