vasudevah-Vasudeva; upasrutya-when he heard; bhrataram-that his dear friend and brother; nandam-Nanda Maharaja; agatam-had come to Mathura; jnatva-when he learned; datta-karam-and had already paid the taxes; rajne-unto the King; yayau-he went; tat-avamocanam-to the residential quarters of Nanda Maharaja.