SB 9.8.7
so ’svamedhair ayajata
sarva-veda-suratmakam
aurvopadista-yogena
harim atmanam isvaram
tasyotsrstam pasum yajñe
jaharasvam purandarah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Following the instructions of the great sage Aurva, Sagara Maharaja performed asvamedha sacrifices and thus satisfied the Supreme Lord, who is the supreme controller, the Supersoul of all learned scholars, and the knower of all Vedic knowledge, the Supreme Personality of Godhead. But Indra, the King of heaven, stole the horse meant to be offered at the sacrifice.