Śrīmad-Bhāgavatam · Text 9.6.14
Who is speaking and story frame
वचनाद् देवदेवस्य विष्णोर्विश्वात्मन: प्रभो: ।
वाहनत्वे वृतस्तस्य बभूवेन्द्रो महावृष: ॥ १४ ॥
vacanād deva-devasya
viṣṇor viśvātmanaḥ prabhoḥ
vāhanatve vṛtas tasya
babhūvendro mahā-vṛṣaḥ
Purañjaya agreed to kill all the demons, on the condition that Indra would be his carrier. Because of pride, Indra could not accept this proposal, but later, by the order of the Supreme Lord, Viṣṇu, Indra did accept it and became a great bull carrier for Purañjaya.
Read this verse on Vedabase.ioThis verse has no purport; its meaning is explained by the verses around it.