The Pandavas then saw their mother Kunti walking slowly across the battlefield, bending down to look at the faces of the fallen Kaurava soldiers. "Mother!" they shouted. "What are you doing? Those are the Kauravas."
"I am looking for your brother," she said.
They stared at her in confusion.
"I am looking for Karna, my first-born son."
At her words, Arjuna felt faint. "You mean I killed my own brother?" he gasped.
"And did Karna know this?" Yudhishthira asked.
"Yes," said Kunti sadly. "He knew, and he promised I would see five sons survive the war. He kept his promise."
Inspired by: Jaya: An Illustrated Retelling of the Mahabharata by Devdutt Pattanaik.
Notes: This story is on p. 298.