vayaṁ marutvantam ihārtha-nāśanaṁ
hvayāmahe tvac-chravasā hata-tviṣam
ayātayāmopahavair anantaraṁ
prasahya rājan juhavāma te 'hitam
vayam - we; marut-vantam - King Indra; iha - here; artha - of your interest; nāśanam - the destroyer; hvayāmahe - we shall call; tvat-śravasā - by your glory; hata-tviṣam - already bereft of his power; ayātayāma - never before used; upahavaiḥ - by mantras of invocation; anantaram - without delay; prasahya - by force; rājan - O King; juhavāma - we shall sacrifice in the fire; te - your; ahitam - enemy.
By chanting the Vedic mantras properly in a sacrifice, one can perform many wonderful things. In Kali-yuga, however, there are no qualified brāhmaṇas who can chant the mantras properly. Consequently no attempt should be made to perform such big sacrifices. In this age the only sacrifice recommended is the saṅkīrtana movement.