vidhamantaṁ sva-sainyāni
dyumantaṁ rukmiṇī-sutaḥ
pratihatya pratyavidhyān
nārācair aṣṭabhiḥ smayan
vidhamantam - smashing; sva - His; sainyāni - soldiers; dyumantam - Dyumān; rukmiṇī-sutaḥ - the son of Rukmiṇī (Pradyumna); pratihatya - counterattacking; pratyavidhyāt - He struck back; nārācaiḥ - with special arrows made of iron; aṣṭabhiḥ - eight; smayan - while smiling.
Śrīla Viśvanātha Cakravartī comments that Pradyumna challenged Dyumān, saying “Now see if you can strike Me!” After saying this and allowing Dyumān to shoot his weapons, Pradyumna released His own deadly arrows.