Srimad-Bhagavatam: Canto 4 - Chapter 1 - Verse 17
Sanskrit:
सोऽश्वं रूपं च तद्धित्वा तस्मा अन्तर्हित: स्वराट् ।वीर: स्वपशुमादाय पितुर्यज्ञमुपेयिवान् ॥ १७ ॥
ITRANS:
so ’śvaṁ rūpaṁ ca tad dhitvātasmā antarhitaḥ svarāṭvīraḥ sva-paśum ādāyapitur yajñam upeyivān
Translation:
When Indra saw that the son of Pṛthu was chasing him, he immediately abandoned his false dress and left the horse. Indeed, he disappeared from that very spot, and the great hero, the son of Mahārāja Pṛthu, returned the horse to his father’s sacrificial arena.