The Geographical Dictionary of Ancient and Mediaeval India c5.s9.149

c5.s9.149

Kosala—Oudh (see Ayodhya), it was divided into two kingdoms called North Kosala (Bahraich district) and Kosala (Ramayana, Uttara K, ch 107, Padma P Uttara, ch 68, Avadana Sataka in the Sanskrit Buddhist Literature of Nepal by Dr R L Mitra) The capital of the latter was Kusavati founded by Kusa, and the capital of the former was Sravasti At the time of Buddha, that is, in the fifth and sixth centuries BC Kosala was a powerful kingdom which included Benares and Kapilavastu, its capital was then Sravasti But about 300 BC it was absorbed into the Magadha kingdom, the capital of which was Pataliputra (Patna)