कंपिल्ले णयरे राया, उदिण्ण बलवाहणे ।
णामेणं संजए णामं, मिगव्वं उवणिग्गए ॥१८.१॥
In the city of Kāmpilya, the renowned King Sañjaya, endowed with a vast army and many vehicles, went out one day for a hunt.
King Sañjaya was the ruler of Kāmpilya, rich in military might. One day he set out from his city for a hunt, surrounded by the full splendour of his four-fold army. This sets the stage: a man at the peak of worldly power, about to encounter something that will shatter his attachment to all of it.
The simple version: A powerful king named Sañjaya rode out from his grand city one day to go hunting in the forest with his enormous army surrounding him.