In plain words
Whip in hand, reins drawn tight, You drove the chariot in battle for Indra's son. And from hiding, with one arrow, You killed a son of Indra. Ha, ha, ha! Salutation to Nārāyaṇa.
Word for word
Holding the whip and tightening the reins, You yoked the chariot in battle for Indra's son and stood by him, alas! And, hidden, with an arrow You killed one son of Indra: ha! ha! ha! Salutation to Nārāyaṇa.