Chakra

Kuru told Vishnu that all eight virtues were present in his own body and it would not be a difficult task to cultivate these things. 

Lord Vishnu wanted to test his commitment and sincerity and said- "Give the seeds to me. I would sow the seeds while you should plough the field."

1. Kuru outstretched his right hand but Lord Vishnu cut it into thousands of pieces with his chakra. All the pieces were distributed among the deities 
2. But Kuru was unfazed and again stretched his left hand towards Lord Vishnu. But his left hand too met the same fate. 
3. In this way, the most generous and benevolent King Kuru offered all his organs to Lord Vishnu. But all the organs were severed by Lord Vishnu. 
4. At last, Kuru offered his head as he had nothing else to offer.

Lord Vishnu was pleased by his generosity and asked him to demand anything. Kuru replied-

1. All the area cultivated by me should become famous as a sacred pilgrimage. 
2. All the devotees who visit or die at this sacred pilgrimage must attain salvation. 
3. This place should be known by my name.