Mahabharata 12.1.22

12.1.22

toyakarmaṇi yaṃ kuntī kathayāmāsa sūryajam |
putraṃ sarvaguṇopetamavakīrṇaṃ jale purā || 22 ||

That hero who had the strength of ten thousand elephants, who in this world was an unrivalled car-warrior, who was possessed of leonine pride and gait, who was endued with great intelligence and compassion, whose liberality was very great, who practised many high vows, who was the refuge of the Dhartarashtras, who was sensitive about his honour, whose prowess was irresistible, who was ready to pay off all injuries and was always wrathful (in battle), who overthrew us in repeated encounters, who was quick in the use of weapons, conversant with every mode of warfare, possessed of great skill, and endued with wonderful valour (that Karna) was a son of Kunti, born secretly of her, and therefore, a uterine brother of ours. Whilst we were offering oblations of water unto the dead, Kunti spoke of him as the son of Surya. Possessed of every virtue, that child had been cast into the water. Having placed him in a basket made of light materials, Kunti committed him to the current of Ganga. He who was regarded by the world as a Suta's child born of Radha, was really the eldest son of Kunti and, therefore, our uterine brother. Covetous of kingdom, alas, I have unwittingly caused that brother of mine to be slain. It is this that is burning my limbs like a fire burning a heap of cotton. The white-steeded Arjuna knew him not for a brother. Neither I, nor Bhima, nor the twins, knew him for such. He, however, of excellent bow, knew us (for his brothers).