tatra - on the bank of the river; tadā - at the time; rājan - O King; hariṇī - a doe; pipāsayā - because of thirst; jalāśaya-abhyāśam - near the river; eka - one; eva - certainly; upajagāma - arrived.

O King, while Bharata Mahārāja was sitting on the bank of that river, a doe, being very thirsty, came there to drink.