108
Śrīmad-Bhāgavatam
[Canto 6, Ch. 9]
TRANSLATION
After Viśvarūpa was killed, his father, Tvaṣṭā, performed ritualistic ceremonies to kill Indra. He offered oblations in the sacrificial fire, saying, “O enemy of Indra, flourish to kill your enemy without delay.”
PURPORT
There was some defect in Tvaṣṭā’s chanting of the  mantra  because he chanted it long instead of short, and therefore the meaning changed. Tvaṣṭā intended to chant the word  indra-śatro , meaning, “O enemy of Indra.” In this  mantra , the word  indra  is in the possessive case ( ṣaṣṭhī ), and the word  indra-śatro  is called a  tat-puruṣa  compound ( tatpuruṣa-samāsa ). Unfortunately, instead of chanting the  mantra  short, Tvaṣṭā chanted it long, and its meaning changed from “the enemy of Indra” to “Indra, who is an enemy.” Consequently instead of an enemy of Indra’s, there emerged the body of Vṛtrāsura, of whom Indra was the enemy.
TEXT 12
अथान्वादार्यपचनादुत्थितो घोरदर्शनः । कृतान्त इव लोकानां युगान्तसमये यथा ॥१२॥
athānvāhārya-pacanād   utthito ghora-darśanaḥ   kṛtānta iva lokānām   yugānta-samaye yathā
atha —thereafter;  anvāhārya-pacanāt —from the fire known as Anvāhārya;  utthitaḥ —arisen;  ghora-darśanaḥ —appearing very fearful;  kṛtāntaḥ —personified annihilation;  iva —like;  lokānām —of all the planets;  yuga-anta —of the end of the millennium;  samaye —at the time;  yathā —just as.
TRANSLATION
Thereafter, from the southern side of the sacrificial fire known as Anvāhārya came a fearful personality who looked like the destroyer of the entire creation at the end of the millennium.