Srimad-Bhagavatam: Canto 8 - Chapter 1 - Verse 5
ततो रथ: काञ्चनपट्टनद्धोहयाश्च हर्यश्वतुरङ्गवर्णा: ।ध्वजश्च सिंहेन विराजमानोहुताशनादास हविर्भिरिष्टात् ॥ ५ ॥
tato rathaḥ kāñcana-paṭṭa-naddhohayāś ca haryaśva-turaṅga-varṇāḥdhvajaś ca siṁhena virājamānohutāśanād āsa havirbhir iṣṭāt
When ghee [clarified butter] was offered in the fire of sacrifice, there appeared from the fire a celestial chariot covered with gold and silk. There also appeared yellow horses like those of Indra, and a flag marked with a lion.