Puranjaya 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, Visnu, Indra did accept it and became a great bull

Expressions researched:
"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"

Srimad-Bhagavatam

SB Canto 9

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.

SB 9.6.14, Translation

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.