Karna the Warrior could not make that promise, for if he did, he would have to revoke another one. Tomorrow he would go to war, and his enemies would be the Pandavas. They were the ones, Arjuna in particular, who had publicly reviled him for being a lowly charioteer's son And it was Duryodhana, the eldest of one hundred Kaurava brothers, that came to his rescue by gifting him a kingdom of his own. Karna, in return, had pledged Duryodhana eternal fielty. But Karna the generous could not refuse his mother what she asked of him. Made a small adjustment, took a somewhat altered oath.