By Swami Harshananda
Arjuna had once been cursed to become a eunuch by the nymph Urvaśī after he respectfully spurned her amorous advances.
When the Kauravas attacked Virāta’s capital and seized the palace cows, Bṛhannalā became the charioteer of Uttara-kumāra, the son of King Virāta. Uttara-kumāra went to the battlefield to repulse the attack but was too frightened to fight. So, Bṛhannalā had to reveal his identity and do fight himself.
- The Concise Encyclopedia of Hinduism, Swami Harshananda, Ram Krishna Math, Bangalore