During their exile, the forest rishis told the Pandavas many stories, including this story about their ancestor, King Kuru.
King Kuru took his plow and went into the field. He ran out of seed, so he cut off his flesh for seed, watering the field with his blood.
"King Kuru, what do you want?" Indra asked. "I will grant you a boon!"
"I need nothing," replied Kuru, "but please bless this land so that anyone who dies here in the act of renunciation or in the act of war will ascend to heaven!"
Indra agreed. That field was Kuru-kshetra, Kuru-Field.
Inspired by: Jaya: An Illustrated Retelling of the Mahabharataby Devdutt Pattanaik.
Notes: This story is on p. 174.