Bhagavatapurana 9.8.7

9.8.7

anantarvāsasaḥ kāṃścidabahirvāsaso 'parān /
so 'śvamedhairayajata sarvavedasurātmakam //

6. & 7. However, in obedience to his preceptor's words he did not kill them but caused them to be disfigured; some were wholly shaved; some left with their beards; some were left only with the hair on their head, and some were half shaven; some ripped of under garment and some others of upper garment.

8. He worshipped the Supreme Ruler Hari who is in the form of all the Vedas and the gods by performing Asvamedha sacrifices in the manner taught by Aurva; and in one of his sacrifices Indra stole away the consecrated horse sent out (to go round the world).