Srimad Bhagavatam — Shashtha Skandha, Shloka 20
Indra’s Brahma-hatyā, Flight from Sin, and Purification by Aśvamedha
अथेज्यमाने पुरुषे सर्वदेवमयात्मनि । अश्वमेधे महेन्द्रेण वितते ब्रह्मवादिभि: ॥ १९ ॥ स वै त्वाष्ट्रवधो भूयानपि पापचयो नृप । नीतस्तेनैव शून्याय नीहार इव भानुना ॥ २० ॥
athejyamāne puruṣe sarva-devamayātmani aśvamedhe mahendreṇa vitate brahma-vādibhiḥ
随后，婆罗门论师们为大因陀罗展开马祭；因他在此祭中礼敬那自性含摄诸天的至上人格神，因陀罗一切罪业的反应皆得消弭。噢，国王！纵然他曾犯下杀害特瓦什塔之子这等重罪，也被此祭立刻化为乌有，如同晨日初升，雾霭顿散。
FAQs
This verse says that even a great burden of sin—like that from killing Vṛtrāsura—can be nullified by the proper sacrificial act, compared to fog vanishing in sunlight.
He is called tvāṣṭra because he was born from Tvaṣṭā (Viśvarūpa’s father), and thus his slaying is described as 'tvāṣṭra-vadha.'
Sincere, dharmic corrective action—done with proper intent and guidance—can gradually clear heavy guilt and wrongdoing, just as light naturally removes darkness.