|King of Kosala|
Virudhaka (Sanskrit: Virūḍhaka, Pali: Viḍūḍabha) was a king of Kosala during the lifetime of the Buddha. He was the son and successor of Pasenadi (Prasenajit), king of Kosala. Virūḍhaka attacked and virtually annihilated the little autonomous tribe of Shakyas, to which the Buddha belonged, and Koliyas, in the Himalayan foothills. He never returned to his capital, Sravasti, and a little later Ajatshatru, the mighty ruler of Magadha, annexed his kingdom. 
- Sastri 1988, p. 17.
- A.L. Basham, The Wonders that was India, 1967, p. 47
- Sastri, K. A. Nilakanta, ed. (1988) , Age of the Nandas and Mauryas (Second ed.), Delhi: Motilal Banarsidass, ISBN 81-208-0465-1
- Sen, Sailendra Nath (1999) , Ancient Indian History and Civilization (Second ed.), New Age International Publishers, ISBN 81-224-1198-3
- Basham, A. L. The Wonder That was India. New York: Hawthorn Books, 1963.