Srimad Bhagavatam Canto 06, Chapter 13, Text 07

SB 6.13.7

hayamedhena purusam
 paramatmanam isvaram
istva narayanam devam
 moksyase ’pi jagad-vadhat
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
The rsis continued: O King Indra, by performing an asvamedha sacrifice and thereby pleasing the Supreme Personality of Godhead, who is the Supersoul, Lord Narayana, the supreme controller, one can be relieved even of the sinful reactions for killing the entire world, not to speak of killing a demon like Vrtrasura.
Srimad Bhagavatam Canto 06, Chapter 13, Text 06
Srimad Bhagavatam Canto 06, Chapter 13, Text 08-09