Srimad Bhagavatam Canto 06, Chapter 13, Text 06

SB 6.13.6

sri-suka uvaca
rsayas tad upakarnya
 mahendram idam abruvan
yajayisyama bhadram te
 hayamedhena ma sma bhaih
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Sri Sukadeva Gosvami said: Hearing this, the great sages replied to King Indra, “O King of heaven, all good fortune unto you. Do not fear. We shall perform an asvamedha sacrifice to release you from any sin you may accrue by killing the brahmana.”
Srimad Bhagavatam Canto 06, Chapter 13, Text 05
Srimad Bhagavatam Canto 06, Chapter 13, Text 07