prāptaḥ prācīṁ sarasvatīm

tayoh-between them; evam-thus; kathayatoh-engaged in conversation; prthivi-earth; dharmayoh-and the personality of religion; tada-at that time; pariksit-King Pariksit; nama-of the name; rajarsih-a saint amongst kings; praptah-arrived; pracim-flowing towards the East; sarasvatim-River Sarasvati.