Kosala kō´sələ [key], ancient Indian kingdom, corresponding roughly in area with the region of Oudh . Its capital was Ayodhya . It was a powerful state in the 6th cent. BC but was weakened by a series of wars with the neighboring kingdom of Magadha and finally (4th cent. BC) absorbed by it. Kosala was the setting of much Sanskrit epic literature including the Ramayana . Buddha and Mahavira, founder of Jainism , taught in the kingdom.
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